Perhaps you should try some spelling variations:
zhong tai » hong tan, hong hai, zhong zhi
hua gene » human gene, hua ren, hy5 gene
yang jun » yang jui, pang jun, yang jin
yin yi » yin yin, lin yi, qin yi
yan zi » yan zhi, yuan zi, ban zi
a gene » a genre, a gender, a gentle
hong a » hong ma, hong w, kong a

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: wan ((yin yi) OR (yan zi)) ((hua gene) OR (a gene)) yang jun ((hong a) OR (zhong tai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yin yi) or (yan zi)) ((hua gene) OR (a gene)) yang jun ((hong a) or (zhong tai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wan ((yin yi) or (yan zi)) ((hua gene) OR (a gene)) yang jun ((hong a) or (zhong tai)) ;*.