Perhaps you should try some spelling variations:
"ʻusfuri, khalaf ibn hayyan, -854. tarikh khalij ibn hayyan." » "ʻusfuri, khalaf ibn hayyan, -854. tarikh halab ibn hayyan." (Expand Search), "ʻusfuri, khalil ibn hayyan, -854. tarikh khalij ibn hayyan." (Expand Search), "ʻusfuri, khalaf abu hayyan, -854. tarikh khalij abu hayyan." (Expand Search), "ʻusfuri, khalaf ibn hayyan, -854. tarikh khalil ibn hayyan." (Expand Search), "ʻusfuri, khalaf ibn hayyan, -854. tarikh khalifa ibn hayyan." (Expand Search)
"ʻusfuri, khalid ibn hayyan, -854. tarikh khalij ibn hayyan." » "ʻusfuri, khalid ibn hayyan, -854. tarikh halab ibn hayyan." (Expand Search), "ʻusfuri, khalid abu hayyan, -854. tarikh khalij abu hayyan." (Expand Search), "ʻusfuri, khalid ibn hayyan, -854. tarikh khalil ibn hayyan." (Expand Search), "ʻusfuri, khalid ibn hayyan, -854. tarikh khalifa ibn hayyan." (Expand Search), "ʻusfuri, khalil ibn hayyan, -854. tarikh khalij ibn hayyan." (Expand Search), "ʻusfuri, walid ibn hayyan, -854. tarikh khalij ibn hayyan." (Expand Search)
"ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifa's ibn khayyat." » "ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifa ibn khayyat." (Expand Search), "ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifa's life khayyat." (Expand Search), "ʻusfuri, khalil ibn khayyat, -854. tarikh khalifa's ibn khayyat." (Expand Search), "ʻusfuri, khalifah al khayyat, -854. tarikh khalifa's ibn khayyat." (Expand Search)
"ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifah ibn khayyat." » "ʻusfuri, khalil ibn khayyat, -854. tarikh khalil ibn khayyat." (Expand Search), "ʻusfuri, khalifah al khayyat, -854. tarikh khalifah al khayyat." (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifah ibn khayyat.") or ((((("ʻusfuri, khalaf ibn hayyan, -854. tarikh khalij ibn hayyan.") or ("ʻusfuri, khalid ibn hayyan, -854. tarikh khalij ibn hayyan."))) or ("ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifa's ibn khayyat."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifah ibn khayyat.") OR ((((("ʻusfuri, khalaf ibn hayyan, -854. tarikh khalij ibn hayyan.") OR ("ʻusfuri, khalid ibn hayyan, -854. tarikh khalij ibn hayyan."))) OR ("ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifa's ibn khayyat.")))).
• Removing quotes may allow a broader search: (( ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifah ibn khayyat. ) or ((((( ʻusfuri, khalaf ibn hayyan, -854. tarikh khalij ibn hayyan. ) or ( ʻusfuri, khalid ibn hayyan, -854. tarikh khalij ibn hayyan. ))) or ( ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifa's ibn khayyat. )))).
• Adding a wildcard symbol may retrieve word variants: (("ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifah ibn khayyat.") or ((((("ʻusfuri, khalaf ibn hayyan, -854. tarikh khalij ibn hayyan.") or ("ʻusfuri, khalid ibn hayyan, -854. tarikh khalij ibn hayyan."))) or ("ʻusfuri, khalifah ibn khayyat, -854. tarikh khalifa's ibn khayyat."))))*.

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