Perhaps you should try some spelling variations:
yang ying » yang jing, huang ying, liang ying
yang yang » wang yang, wang yan
zhong tai » hong tan, hong hai, zhong zhi
iii gene » iii rene, iii gender, iii genome
gene tan » gene bank
tan tan » tas tan, tin tan, tang tang
hong ng » hong kong, hong jong, hong hong
hong g » hong w, hong 7, hong 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: wang ((yang ying) OR (yang yang)) iii gene tan tan ((zhong tai) OR (((hong g) OR (hong ng)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang ying) or (yang yang)) iii gene tan tan ((zhong tai) or (((hong g) OR (hong ng)))) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yang ying) or (yang yang)) iii gene tan tan ((zhong tai) or (((hong g) OR (hong ng)))) ;*.