Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yuan ming » yuan ting, kian ming, tuan minh
dan yang » daun yang, tan yang, wang yang
wang li » wang lei, wang lin, tang li
li test » ai test, i test, ii test
yang li » yang lin, yang di, yang yi
yang xi » yang di, yang yi, yang jui
hong yu » wong yue

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

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