Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
hua gene » human gene, hua ren, hy5 gene
yang tin » yang jin, yang lin, yang jing
tin hong » tan hong, kia hong, thi hong
hong hai » shang hai, zhong tai, dang hai
a gene » a genre, a gender, a gentle
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 (a gene)) yang tin 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 (a gene)) yang tin hong hai ;.
• Adding a wildcard symbol may retrieve word variants: (((wang or wan) yan) or (yang yang)) ka ((hua gene) or (a gene)) yang tin hong hai ;*.