Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu tinh » lieu tinh, kieu tinh, hieu binh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
khoan cam » khoa cam, khoan va, phan cam
cua hang » cua dang, cua nhung, cua cong
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) OR (chieu tinh)) - canh tranh cua hang cong tac ((ban cua) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (chieu tinh)) - canh tranh cua hang cong tac ((ban cua) OR (khoan cam)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu tinh) OR (chieu tinh)) - canh tranh cua hang cong tac ((ban cua) or (khoan cam))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu tinh) OR (chieu tinh)) - canh tranh cua hang cong tac ((ban cua) or (khoan cam))*.