Perhaps you should try some spelling variations:
among syrian » among african, among german, among social
gene wang » gene bank, wen wang
hua gene » human gene, a gene, hua ren
wang lei » wang wei, wang fei, wang li
dong di » dong sin
long du » long d, long run, long did
long do » long d, longer do, long ago

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