Perhaps you should try some spelling variations:
yuan wang » yan wang, yuan kang, yuan chang
china dan » china den, china data, china des
wang can » wang yan, wang ban, wang dan
dan yang » daun yang, tan yang, wang yang
dr congo » du congo, dr kongo, _ congo
di wong » kie wong
dr wong » dr ong, dr kongo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: yuan wang can china dan yang ((di wong) OR (((dr wong) OR (dr congo)))) yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yuan wang can china dan yang ((di wong) or (((dr wong) OR (dr congo)))) yue ;~".
• Adding a wildcard symbol may retrieve word variants: yuan wang can china dan yang ((di wong) or (((dr wong) OR (dr congo)))) yue ;*.