Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh va » trinh van, trinh vat, trinh ve
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan
ho lieu » so lieu, co lieu, ho kieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho lieu tinh - canh trinh va nhung cong ((tac toan) OR (tam toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - canh trinh va nhung cong ((tac toan) OR (tam toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - canh trinh va nhung cong ((tac toan) OR (tam toan)) cao*.