Perhaps you should try some spelling variations:
hoc thuyet » hoc chuyen
thuyet dan » thuyet va, thuyet bai, truyen dan
cua nhung » va nhung
cua hang » cua dang, cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 dan - canh tranh ((cua hang) or (cua nhung)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet dan - canh tranh ((cua hang) OR (cua nhung)) cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet dan - canh tranh ((cua hang) or (cua nhung)) cong tac toan cao*.