Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
bang cong » dang cong, bang song, hang cong
doc hieu » toc thieu, hoc thieu, hoc hien
cua bang » chua bang, cua ban, cua dang
van tay » van tai, van tan, van ty
van tam » van tham, van tai, van tan

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 (theo tieu)) xanh - hanh trinh cua bang cong ((van tay) OR (van tam)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo tieu)) xanh - hanh trinh cua bang cong ((van tay) OR (van tam)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo tieu)) xanh - hanh trinh cua bang cong ((van tay) OR (van tam)) cao".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo tieu)) xanh - hanh trinh cua bang cong ((van tay) OR (van tam)) cao*.