Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
song ming » song bing, gong min, jong min
jeong shu » jeong su, cong shu
yong yan » yang yang, ying yang, yong yoon
song min » gong min, jong min, song jin
di l » dr l, i l, d l
de l » de la, dr l

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 yan) OR (dong yang)) ((di l) OR (de l)) ((song min) OR (song ming)) jeong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yong yan) OR (dong yang)) ((di l) or (de l)) ((song min) or (song ming)) jeong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yong yan) OR (dong yang)) ((di l) or (de l)) ((song min) or (song ming)) jeong shu ;*.