Perhaps you should try some spelling variations:
among african » among africans, among american, among mexican
hua gene » human gene, a gene, hy5 gene
yang jin » yang jie, yang jun, ying jin
jin meng » lin meng, juan meng, jin ying
meng shu » cong shu
dong di » dong sin
hua ren » hua chen

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) OR (hua ren)) yang jin meng shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong di) OR (among african)) ya ((hua gene) OR (hua ren)) yang jin meng shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong di) or (among african)) ya ((hua gene) OR (hua ren)) yang jin meng shu ;".
• Adding a wildcard symbol may retrieve word variants: ((dong di) or (among african)) ya ((hua gene) OR (hua ren)) yang jin meng shu ;*.