Perhaps you should try some spelling variations:
thuyet mach » thuyet xac, thuyet cac, thuyet anh
hoc thuyet » hoc chuyen
tranh xuat » tranh cua, tran xuan, tranh luan
xuat thong » xuat thuong, suat thong, luat thuong
thong cong » trong cong, tong cong, thong thong
ban thanh » ban hanh, ban hang
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet mach - canh tranh xuat thong cong ((dan than) or (ban thanh)) man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet mach - canh tranh xuat thong cong ((dan than) OR (ban thanh)) man.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet mach - canh tranh xuat thong cong ((dan than) or (ban thanh)) man*.