Perhaps you should try some spelling variations:
china tan » china top, china two, china taiwan
wang nan » wang yan, wang ban, wang yang
wang dan » wang yan, wang ban, wang yidan
tan yong » tan hong, tan kong, tan yang
yong lin » yang lin, song lina, yong kim
long han » long chain, long thanh, long haul
hong hai » shang hai, zhong tai, dang hai

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) OR (wang dan)) can china tan yong lin ((long han) OR (hong hai)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang nan) or (wang dan)) can china tan yong lin ((long han) or (hong hai)) ;*.