Perhaps you should try some spelling variations:
dong nana » dong yang
gene yang » gene bank
dong nan » dong yang, dong sin, dong bin
yala hua » ya hua
hua gene » human gene, a gene, hua ren
yang tan » yang fan, yang dean, yang yang
hong hai » shang hai, zhong tai, dang hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong nana) OR (dong nan)) yala hua gene yang tan hong hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong nana) OR (dong nan)) yala hua gene yang tan hong hai ;".
• Adding a wildcard symbol may retrieve word variants: ((dong nana) OR (dong nan)) yala hua gene yang tan hong hai ;*.