Perhaps you should try some spelling variations:
trieu minh » trieu tinh, trien minh, trien kinh
hoc trieu » hoc thieu, hoc tieu, hoc dieu
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
tac toan » tap toan, tam toan, hach toan
bai toan » bai 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 trieu minh - canh tranh cua hang cong ((((tac toan) OR (tinh toan))) OR (bai toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc trieu minh - canh tranh cua hang cong ((((tac toan) or (tinh toan))) or (bai toan)) cau*.