Perhaps you should try some spelling variations:
hieu tinh » chieu tinh, lieu tinh, kieu tinh
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
khoan cam » khoa cam, khoan va, phan cam
doc hieu » toc thieu, hoc thieu, hoc hien
cua bang » chua bang, cua ban, cua dang
cong tac » cong ty
ban cua » ban quan

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 tinh - canh tranh cua bang cong tac ((ban cua) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - canh tranh cua bang cong tac ((ban cua) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - canh tranh cua bang cong tac ((ban cua) or (khoan cam))*.