Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trung » thanh trung, hanh trang, manh trung
hoc chieu » hoc thieu, ho chieu, hoc hien
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, thai cao, than cap
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: hoc chieu tinh - hanh trung va dung ((huong dan) or (cong tan)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - hanh trung va dung ((huong dan) OR (cong tan)) than cao.
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh trung va dung ((huong dan) or (cong tan)) than cao*.