Perhaps you should try some spelling variations:
dong nana » dong nan, dong yang
nana yala » nana yaa
yala hua » ya hua
hua gene » human gene, a gene, hua ren
yang tan » yang dean, yang yang, liang tan
yang fan » zhang 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 yala hua gene ((yang tan) OR (yang fan)) hong hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong nana yala hua gene ((yang tan) OR (yang fan)) hong hai ;".
• Adding a wildcard symbol may retrieve word variants: dong nana yala hua gene ((yang tan) OR (yang fan)) hong hai ;*.