Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
mot chieu » ho chieu
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan

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: ((mot chieu) OR (doi chieu)) xanh - canh tranh cua nhung cong ((tac toan) OR (tap toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (doi chieu)) xanh - canh tranh cua nhung cong ((tac toan) OR (tap toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (doi chieu)) xanh - canh tranh cua nhung cong ((tac toan) OR (tap toan)) cao*.