Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
gene yang » gene bank
zhong tai » hong hai, zhong zhi
yang min » yang mind, yang jin, tang min
a gene » a genre, a gender, a gentle
ka a » kai a, a a, k a
zhong » zlong
hong » long
tan » than

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) OR (wang yang)) ka a gene yang min ((zhong tai) or (hong tan)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (wang yang)) ka a gene yang min ((zhong tai) OR (hong tan)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) OR (wang yang)) ka a gene yang min ((zhong tai) or (hong tan)) ;".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) OR (wang yang)) ka a gene yang min ((zhong tai) or (hong tan)) ;*.