Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trong » hanh trang, anh trong, hinh trong
doi chieu » doc hieu, doi chi, ho chieu
trong hoc » truong hoc, tuong hoc, thong hoc
hoc hang » hoc hanh, hoc bang, hoc tang
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - hanh trong hoc hang ((cong dan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh trong hoc hang ((cong dan) OR (cong san)) toan ban*.