Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dang cong » dung cong
dinh cuu » dinh chi
cuu dang » cua dang, cuu nang, cuu danh
cong van » cong vang, cong san, song van
toan ban » van ban
toan cao » 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 ((hieu lang) or (chieu sang)) - hanh dinh cuu dang cong van ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (chieu sang)) - hanh dinh cuu dang cong van ((toan ban) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (chieu sang)) - hanh dinh cuu dang cong van ((toan ban) or (toan cao))*.