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

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

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