Perhaps you should try some spelling variations:
hanh trinh » canh tranh
luat trong » suat trong, thuat trong, luat thuong
hoc thieu » toc thieu, hoc hien
doc hieu » toc thieu, hoc hien
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) sach - ((hanh trinh) OR (hanh chinh)) luat trong cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doc hieu)) sach - ((hanh trinh) OR (hanh chinh)) luat trong cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) sach - ((hanh trinh) OR (hanh chinh)) luat trong cong tac toan cao*.