Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc trieu » hoc thieu, hoc tieu, hoc dieu
cua nhung » va nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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

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