Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
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 than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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 lang)) - hanh trung cao dung cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (hieu lang)) - hanh trung cao dung cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hieu lang)) - hanh trung cao dung cong dan than cao*.