Perhaps you should try some spelling variations:
tranh luat » trinh luat, tranh luan, trinh luan
luat cong » thuat cong, luat chung, cua cong
cong cong » cong dong, trong cong, dung cong
doi thoi » doi thoai, moi thoi, do thoi
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan
doi thi » do thi, doi khi, doi thu

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: ((doi thi) OR (doi thoi)) thanh - canh tranh luat cong cong ((tac toan) OR (tam toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi thi) OR (doi thoi)) thanh - canh tranh luat cong cong ((tac toan) or (tam toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: ((doi thi) OR (doi thoi)) thanh - canh tranh luat cong cong ((tac toan) or (tam toan)) cao*.