Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
dang cong » dung cong
chinh ca » chinh ta, chinh va, chinh tai
cong ban » cong bang, cong san, cong tan
than cao » toan cao, than cap, than sao
thai cao » tai cao, thoai cac, thuat cao
ca dang » cao dang, cua dang, cac dang

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 - hanh chinh ca dang cong ban ((than cao) or (thai cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh chinh ca dang cong ban ((than cao) OR (thai cao)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh chinh ca dang cong ban ((than cao) or (thai cao))*.