Perhaps you should try some spelling variations:
hanh trinh » canh tranh
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan 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 thieu) OR (doi chieu)) xanh - ((hanh trinh) OR (hanh chinh)) quan nhung cong tac toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doi chieu)) xanh - ((hanh trinh) OR (hanh chinh)) quan nhung cong tac toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) xanh - ((hanh trinh) OR (hanh chinh)) quan nhung cong tac toan tap*.