Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
dan toan » van toan, dan than, manh toan
ho lieu » so lieu, co lieu, ho kieu
va dung » van dung, va duong, vat dung

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 dung cong ((((dan toan) or (xuan toan))) or (anh tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - canh trinh va dung cong ((((dan toan) OR (xuan toan))) OR (anh tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - canh trinh va dung cong ((((dan toan) or (xuan toan))) or (anh tuan)) cau*.