Perhaps you should try some spelling variations:
hua gene » human gene, hua ren, hy5 gene
yang jin » yang jie, yang jun, ying jin
jin wong » jin song, john wong, jin ying
wong sam » wong sau, wong lai, kong sar
yan tan » yan clan, yan guan, yan wang
tan tan » tas tan, tin tan, tang tang
a gene » a genre, a gender, a gentle

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan ((yan tan) or (tan tan)) ((hua gene) OR (a gene)) yang jin wong sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan ((yan tan) OR (tan tan)) ((hua gene) OR (a gene)) yang jin wong sam ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan tan) or (tan tan)) ((hua gene) OR (a gene)) yang jin wong sam ;*".