Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, trung tam, tran tuan
hieu manh » hieu nganh, dieu hanh, hien hanh
tuan dung » tuan duong, tran dung, tan dung
trong dan » trong dang, trong san, trong tan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 xanh)) - hanh trung tuan dung trong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - hanh trung tuan dung trong dan toan cao*.