Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
luan hang » luan nang, luan hung, luan tang
ho chieu » hoc thieu, doi chieu, mot chieu
luan han » luan hoan, luan phan, luan van
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (ho chieu)) tinh - hanh trinh ((luan hang) or (luan han)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) tinh - hanh trinh ((luan hang) OR (luan han)) cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) tinh - hanh trinh ((luan hang) or (luan han)) cong tac than cau*.