Perhaps you should try some spelling variations:
huang ying » huang jing, huang ting, huang yang
yang yang » wang yang, wang yan
ying hong » ying chang, hong hong, tin hong
hua gene » human gene, a gene, hy5 gene
hong hai » shang hai, zhong tai, dang hai
hua ren » hua chen
wang » wing, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((wang or wan) yan) or (yang yang)) ka ((hua gene) or (hua ren)) huang ying hong hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((wang OR wan) yan) OR (yang yang)) ka ((hua gene) OR (hua ren)) huang ying hong hai ;.
• Adding a wildcard symbol may retrieve word variants: (((wang or wan) yan) or (yang yang)) ka ((hua gene) or (hua ren)) huang ying hong hai ;*.