Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tang » hanh trang, hanh mang, hanh tung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
anh tang » anh bang, anh dang, anh nang
dan than » dan chan, ban than, van than
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 chieu tinh - ((hanh tang) or (anh tang)) va dung cong ((xuan toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - ((hanh tang) OR (anh tang)) va dung cong ((xuan toan) OR (dan than)) cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - ((hanh tang) or (anh tang)) va dung cong ((xuan toan) or (dan than)) cao*.