Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
quan nhung » cua nhung, luan chung, quang hung
qua nhung » cua nhung, qua chung, chua nhung
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
ho hieu » hoi hieu, nho hieu, co hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho hieu) or (ho chieu)) qua - hanh trinh ((quan nhung) OR (qua nhung)) cong tan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (ho chieu)) qua - hanh trinh ((quan nhung) OR (qua nhung)) cong tan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) or (ho chieu)) qua - hanh trinh ((quan nhung) OR (qua nhung)) cong tan phan tu".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) or (ho chieu)) qua - hanh trinh ((quan nhung) OR (qua nhung)) cong tan phan tu*.