Perhaps you should try some spelling variations:
tranh cua » doanh cua, manh cua
dong cong » duong cong, dung cong, dang cong
doc hieu » toc thieu, hoc thieu
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
hanh cac » hang cac, hanh cat, nhanh cay
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 (hoc hien)) manh - canh tranh cua dong cong tac ((hanh cac) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) manh - canh tranh cua dong cong tac ((hanh cac) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) manh - canh tranh cua dong cong tac ((hanh cac) or (khan cap))*.