Perhaps you should try some spelling variations:
yang july » yang judy, yang jui, yang jun
hyun song » yun song, kyu song
song ming » song bing, song min, gong min
cong van » congo can, duong van, cong sun
yang xi » yang yi, yang jui
ton van » tran van, teun van
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 ((((yang di) OR (yang xi))) OR (yang july)) hyun song ming ((ton van) OR (cong van)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((((yang di) OR (yang xi))) OR (yang july)) hyun song ming ((ton van) OR (cong van)) ;*".