Perhaps you should try some spelling variations:
thuyet hach » thuyet mach, thuyet xac, thuyet cac
hoc thuyet » hoc chuyen
canh doanh » hanh doanh, chinh doanh, doanh doanh
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
van tuan » van quan, 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 thuyet hach - canh doanh cua hang cong ((tinh toan) or (((van tuan) or (anh tuan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet hach - canh doanh cua hang cong ((tinh toan) OR (((van tuan) OR (anh tuan)))) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet hach - canh doanh cua hang cong ((tinh toan) or (((van tuan) or (anh tuan)))) cao*.