Perhaps you should try some spelling variations:
ying yang » yang yang, yin yang, ying chang
yong yan » yang yang, dong yang, yong yoon
hua rene » hua ren, juan rene
yang jin » yang jie, yang jun, ying jin
hong 7hi » hong ghi, zhong zhi, hong hai
yan jiu » yang jie, pang jiu
hong 7 » hong w, hong a, hong g

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yong yan) OR (ying yang)) hua rene ((yan jiu) or (yang jin)) ((hong 7hi) or (hong 7)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yong yan) OR (ying yang)) hua rene ((yan jiu) OR (yang jin)) ((hong 7hi) OR (hong 7)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yong yan) OR (ying yang)) hua rene ((yan jiu) or (yang jin)) ((hong 7hi) or (hong 7)) ;*".