Perhaps you should try some spelling variations:
yong yoon » wong yoon, yong khoon
dong yang » dong hoang, wang yang, yang yang
yong yan » yang yang, ying yang, wang yan
a region » a regional
yang jin » yang jie, yang jun, ying jin
jin kong » jin kang, jin song, king kong
a rein » a reine, a reit
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((((yong yan) or (yong yoon))) or (dong yang)) ((a rein) OR (a region)) yang jin kong sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((((yong yan) OR (yong yoon))) OR (dong yang)) ((a rein) OR (a region)) yang jin kong sar ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((yong yan) or (yong yoon))) or (dong yang)) ((a rein) OR (a region)) yang jin kong sar ;".
• Adding a wildcard symbol may retrieve word variants: wang ((((yong yan) or (yong yoon))) or (dong yang)) ((a rein) OR (a region)) yang jin kong sar ;*.