Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu minh » trieu minh, tien minh, tieu binh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
hoc tieu » hoc thieu, hoc dieu, hoc sieu
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: hoc tieu minh - canh tranh cua nhung cong ((((tac toan) OR (tinh toan))) OR (tap toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc tieu minh - canh tranh cua nhung cong ((((tac toan) or (tinh toan))) or (tap toan)) cau*.