Perhaps you should try some spelling variations:
khung cong » nhung cong, khung long, phung cong
cong toan » cong tan, cong hoan, cong tuan
thanh cac » hanh cac, thanh bac, thanh ca
theo chu » theo chieu, cho chu, chao chu
dong hoc » dong co, dong luc
cong san » cong tac
than cap » khan cap, thanh lap, than cua
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: theo chu han - thanh ((cong toan) or (dong hoc)) khung cong san ((than cap) OR (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu han - thanh ((cong toan) OR (dong hoc)) khung cong san ((than cap) OR (thanh cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu han - thanh ((cong toan) or (dong hoc)) khung cong san ((than cap) OR (thanh cac))".
• Adding a wildcard symbol may retrieve word variants: theo chu han - thanh ((cong toan) or (dong hoc)) khung cong san ((than cap) OR (thanh cac))*.