Perhaps you should try some spelling variations:
thanh trung » thanh tung
va phuong » va thuong, cac phuong
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan khan » tan khang, tan nhan, toan khoan
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (ho chieu)) xanh - thanh trung ((va phuong) or (cac truong)) cong tan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) xanh - thanh trung ((va phuong) OR (cac truong)) cong tan khan cap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) xanh - thanh trung ((va phuong) or (cac truong)) cong tan khan cap*.