Perhaps you should try some spelling variations:
among african » among africans, among american, among mexican
gene wang » gene bank, wen wang
hua gene » human gene, a gene, hua ren
wang lin » wang li, wang qin, yang lin
dong di » dong sin
lin man » lin nan, lin meng
man shu » tan shu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong di) or (among african)) ya hua gene wang lin man shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong di) OR (among african)) ya hua gene wang lin man shu ;.
• Adding a wildcard symbol may retrieve word variants: ((dong di) or (among african)) ya hua gene wang lin man shu ;*.