Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
dung cua » dung luan, dung cho
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van
van cau » van dau, van hau, van chat

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: ((doi chieu) OR (ho chieu)) tinh - thanh ((dung cua) OR (trung tuan)) trong cong tan van cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) tinh - thanh ((dung cua) or (trung tuan)) trong cong tan van cau~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (ho chieu)) tinh - thanh ((dung cua) or (trung tuan)) trong cong tan van cau*.