Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
than china » han china, wuhan china, can china
tuan china » wuhan china, can china, taiwan china
data yang » apa yang
yan wang » yuan wang, yang yang, qian wang
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: ((yan wang) or (yuan chang)) ((than china) or (tuan china)) data yang di wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yan wang) OR (yuan chang)) ((than china) OR (tuan china)) data yang di wong yue ;.
• Adding a wildcard symbol may retrieve word variants: ((yan wang) or (yuan chang)) ((than china) or (tuan china)) data yang di wong yue ;*.