Perhaps you should try some spelling variations:
congo shu » cong shu
tran dai » tran thi, tran nam, tran van
tran dat » tran nam, tran van
song min » song ming, gong min, jong min
song jin » shang jin, song shin, song bing
yi song » yi rong, li song, kim song
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan ((tran dai) OR (tran dat)) yi song min ((congo shu) or (song jin)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ((tran dai) OR (tran dat)) yi song min ((congo shu) OR (song jin)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((tran dai) OR (tran dat)) yi song min ((congo shu) or (song jin)) ;*".