Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
khoan cam » khoa cam, khoan va, phan cam
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
ho lieu » so lieu, co lieu, ho kieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - canh tranh ((cua dung) OR (cua dong)) cong dan ((than cap) OR (khoan cam))~.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - canh tranh ((cua dung) or (cua dong)) cong dan ((than cap) or (khoan cam))*.