Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu quang » thieu quang, hieu quan, hieu qua
hanh trung » thanh trung, hanh trang, manh trung
trung cao » truong cao, trung cap, trung co
dung cong » dung trong
cao dung » cao dang, cao dong, cao ung
cong dan » cong san, cong tan, huong dan
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 ((chieu xanh) or (hieu quang)) - hanh trung cao dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (hieu quang)) - hanh trung cao dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hieu quang)) - hanh trung cao dung cong dan toan cao*.