Perhaps you should try some spelling variations:
hoac khong » hoa khong, hoc khong, hay khong
tranh hoac » thanh hoach, thanh hoa, trinh hoa
khong cong » thong cong, khong cang, chong cong
doc hieu » toc thieu, hoc thieu
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (doc hieu)) manh - canh tranh hoac khong cong dan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (doc hieu)) manh - canh tranh hoac khong cong dan ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (doc hieu)) manh - canh tranh hoac khong cong dan ((toan cau) or (toan ban))*.