Perhaps you should try some spelling variations:
hua gene » human gene, hua ren, hy5 gene
yang thi » dang thi, yang chik, yang di
yang jui » yang judy, yang di, yang xi
hong ghi » zhong zhi, hong g
hong hai » shang hai, zhong tai, dang hai
yan yi » yang yi, tan yi, yan zi
a gene » a genre, a gender, a gentle
wang » wing, wan, lang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yi ((hua gene) OR (a gene)) ((yang thi) OR (yang jui)) ((hong ghi) OR (hong hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yi ((hua gene) OR (a gene)) ((yang thi) or (yang jui)) ((hong ghi) or (hong hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan yi ((hua gene) OR (a gene)) ((yang thi) or (yang jui)) ((hong ghi) or (hong hai)) ;*.