Perhaps you should try some spelling variations:
duong duong » tuong duong, cuong duong, dong duong
chieu xanh » chieu sach, chieu sang, chieu tinh
duong sinh » duong minh, duong manh, trong sinh
sinh toan » tinh toan, hinh toan, minh toan
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
toan tap » toan ban

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 xanh - thanh ((trung va) or (trung ha)) duong duong sinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh ((trung va) OR (trung ha)) duong duong sinh toan tap.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh ((trung va) or (trung ha)) duong duong sinh toan tap*.