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