Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
lieu tinh » trieu tinh, diep tinh
bien tinh » bi tinh, yen tinh, diep tinh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
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) OR (bien tinh)) - canh trinh va dung cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((lieu tinh) OR (bien tinh)) - canh trinh va dung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) OR (bien tinh)) - canh trinh va dung cong dan toan cao*.