Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, mot chieu
quan hang » quan hoang, quan lang, quan hanh
hang cong » dang cong, hang nong, bang cong
than phan » thanh phan, thanh pham, thanh nhan
toan phan » thanh phan, toan ban, hoa phan
ho chieu » theo chieu, hoc thieu, mot chieu

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

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