Perhaps you should try some spelling variations:
china hubei » china hubert, china hui
hubei yang » hui yang
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
yang ka » yang fan, yang yao
long du » long do, long run, long did
long d » long do, long _, long 2

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: ((yang yang) OR (wang yang)) taiwan china hubei yang ka ((long du) OR (long d)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (wang yang)) taiwan china hubei yang ka ((long du) OR (long d)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (wang yang)) taiwan china hubei yang ka ((long du) OR (long d)) ;*.