Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh dinh » thanh dinh, hinh dinh, hanh tinh
hang cong » dang cong, hang nong, bang cong
hieu van » hieu va, thien van, lieu va
cong van » cong vang, cong san, song van
toan ban » van ban
toan cao » toan tap
dinh cu » dinh cuu, dinh chuc, dinh chau
cu hang » cua hang, cu lang, yu hang

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 van) or (chieu sang)) - hanh dinh cu hang cong van ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu van) OR (chieu sang)) - hanh dinh cu hang cong van ((toan ban) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu van) or (chieu sang)) - hanh dinh cu hang cong van ((toan ban) or (toan cao))*.