Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh van » trinh han, trinh quan, trinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
chan cau » phan cau, can cau, chinh cau
ho hieu » hoi hieu, nho hieu, co hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho hieu) or (ho chieu)) lang - canh ((trinh van) or (tinh toan)) nhung cong tan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (ho chieu)) lang - canh ((trinh van) OR (tinh toan)) nhung cong tan chan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) or (ho chieu)) lang - canh ((trinh van) or (tinh toan)) nhung cong tan chan cau*.