Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
kieu tinh » lieu tinh, trieu tinh, bien tinh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
toan tap » toan ban
toan cao » toan ban
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 ((kieu tinh) OR (diep tinh)) - canh trinh va dung cong dan ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((kieu tinh) OR (diep tinh)) - canh trinh va dung cong dan ((toan tap) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((kieu tinh) OR (diep tinh)) - canh trinh va dung cong dan ((toan tap) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho ((kieu tinh) OR (diep tinh)) - canh trinh va dung cong dan ((toan tap) or (toan cao))*.