Perhaps you should try some spelling variations:
yong yoon » wong yoon, yong khoon
wang yang » wang yan, wang liang, wang yanling
chang hai » chang ha, shang hai, change has
dan yang » daun yang, tan yang, yang yang
yang jie » yang di, yang jui, yang xi
yang jin » yang jun, ying jin, shang jin
tan kai » tan kah, yuan kai

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 ((yong yoon) OR (((dan yang) OR (wang yang)))) tan kai ((yang jie) OR (yang jin)) chang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yong yoon) or (((dan yang) or (wang yang)))) tan kai ((yang jie) OR (yang jin)) chang hai ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yong yoon) or (((dan yang) or (wang yang)))) tan kai ((yang jie) OR (yang jin)) chang hai ;*.