Perhaps you should try some spelling variations:
yan clan » das clan, yan guan, yan yuan
hua gene » human gene, hua ren, hy5 gene
wong sau » wong sam, wong siu, wong shiu
yan tan » tan tan, yan guan, yan wang
yang ji » yang jui, yang jie, yang jin
ji wong » ji won, ji zhong, kie wong
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.

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