Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chieu » theo tieu, ho chieu, thi chieu
hang dung » hoang dung, dang dung, hang cung
tai nhung » thai nhung, thi nhung, tai hung
theo chu » cho chu, chao chu, theo yeu
cong tac » cong ty
quan cao » quang cao, quan cau, juan cao
quan ao » quan so, quang cao, quang bao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) tinh - hang dung tai nhung cong tac ((quan cao) OR (quan ao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) tinh - hang dung tai nhung cong tac ((quan cao) OR (quan ao))~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) tinh - hang dung tai nhung cong tac ((quan cao) OR (quan ao))*.