Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
canh trang » canh tranh, hanh trang, banh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
vat dung » van dung, viet dung, mat duong
cong tac » cong ty
hang dau » hang va, hang tai
va dung » van dung, va duong, va ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu tinh - canh trang ((va dung) OR (vat dung)) cong tac ((hang dau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - canh trang ((va dung) OR (vat dung)) cong tac ((hang dau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - canh trang ((va dung) OR (vat dung)) cong tac ((hang dau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - canh trang ((va dung) OR (vat dung)) cong tac ((hang dau) or (phan tu))*.