Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
trinh ve » trinh he, trinh va, trinh vi
ve nhung » va nhung, tu nhung
tac toan » hach toan, tich toan, tac thanh
tam toan » tam than, pham toan, tam thanh
tap toan » tap doan, tap quan, bai toan
so diep » so dieu, sy diep

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so diep tinh - canh trinh ve nhung cong ((tac toan) or (((tam toan) or (tap toan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so diep tinh - canh trinh ve nhung cong ((tac toan) OR (((tam toan) OR (tap toan)))) cao.
• Adding a wildcard symbol may retrieve word variants: so diep tinh - canh trinh ve nhung cong ((tac toan) or (((tam toan) or (tap toan)))) cao*.