Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
yuan wang » yan wang, yuan kang, yuan chang
yu cheng » yu chen, _ cheng
ren yang » ren yan, chen yang, ren weng
pei yang » wei yang, hui yang, pei yun
dan yang » daun yang, tan yang, wang yang
wong yue » wang yue, hong yu
di wong » dr wong, kie wong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yuan wang) or (yu cheng)) than china ((((ren yang) OR (pei yang))) or (dan yang)) di wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yuan wang) OR (yu cheng)) than china ((((ren yang) OR (pei yang))) OR (dan yang)) di wong yue ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan wang) or (yu cheng)) than china ((((ren yang) OR (pei yang))) or (dan yang)) di wong yue ;*".