Perhaps you should try some spelling variations:
thi chieu » thi chien, thi hieu, theo chieu
hanh dinh » thanh dinh, hinh dinh, hanh tinh
cu nhung » cua nhung, tu nhung, du nhung
co nhung » cho nhung, bo nhung, so nhung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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: ((thi chieu) OR (theo tieu)) tinh - hanh dinh ((cu nhung) OR (co nhung)) cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thi chieu) or (theo tieu)) tinh - hanh dinh ((cu nhung) OR (co nhung)) cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo tieu)) tinh - hanh dinh ((cu nhung) OR (co nhung)) cong tan toan cau*.