Perhaps you should try some spelling variations:
luan hang » luan nang, luan han, luan tang
luan hung » luan chung, lan hung, luan ung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cao » toan ban, toan tap
theo te » theo tu, theo tieu, theo yeu
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo te sach - canh tranh ((luan hang) or (luan hung)) ((cong tan) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo te sach - canh tranh ((luan hang) OR (luan hung)) ((cong tan) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: theo te sach - canh tranh ((luan hang) or (luan hung)) ((cong tan) or (cong tac)) toan cao*.