Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dang quan » dang quang, nang quan, dung quan
quan dung » quang dung, quan duong, qua dung
manh toan » thanh toan, anh tuan, tinh toan
anh dang » anh dong, anh dung, anh bang
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu tinh)) - anh dang quan dung trong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu tinh)) - anh dang quan dung trong ((dan toan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu tinh)) - anh dang quan dung trong ((dan toan) or (manh toan)) cao*.