Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
quan duong » quan dong, qua duong, quan vuong
tuan duong » tuyen duong, tuong duong, van duong
ho chieu » hoc thieu, doi chieu, mot chieu
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)) sach - hanh trinh ((quan duong) OR (tuan duong)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - hanh trinh ((quan duong) OR (tuan duong)) cong tac than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) sach - hanh trinh ((quan duong) OR (tuan duong)) cong tac than cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - hanh trinh ((quan duong) OR (tuan duong)) cong tac than cau*.