Perhaps you should try some spelling variations:
yan ching » ya ching, ban chiang, can china
chen yong » chen rong, chen yang, zhen yong
wang nan » wang yan, wang ban, wang dan
wen yong » wang yong, zhen yong, tan yong
zong hai » dang hai, long han, zong he
hong hai » shang hai, zhong tai, dang hai
nan yan » nan ya, wang yan, qian yan

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: wang nan yan ching ((wen yong) OR (chen yong)) lin ((zong hai) OR (hong hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang nan yan ching ((wen yong) OR (chen yong)) lin ((zong hai) or (hong hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang nan yan ching ((wen yong) OR (chen yong)) lin ((zong hai) or (hong hai)) ;*.