Perhaps you should try some spelling variations:
tranh qua » tranh cua, thanh qua, trinh qua
tran manh » tran minh, tran thanh, tran van
qua cong » cua cong, qua song, va cong
cong van » cong vang, song van, cong tan
cong san » cong tac
than man » than ma, thanh san, than phan
cho chu » cho thue
chu han » chu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho chu han - canh tranh qua cong ((cong van) OR (cong san)) ((than man) or (tran manh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho chu han - canh tranh qua cong ((cong van) OR (cong san)) ((than man) OR (tran manh)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho chu han - canh tranh qua cong ((cong van) OR (cong san)) ((than man) or (tran manh))".
• Adding a wildcard symbol may retrieve word variants: cho chu han - canh tranh qua cong ((cong van) OR (cong san)) ((than man) or (tran manh))*.