Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dinh » thanh dinh, hinh dinh, hanh tinh
cuu thong » cuu thuong, cuu tong, cuu chong
hieu van » hieu va, thien van, lieu va
dinh cuu » dinh chi
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: theo ((hieu lang) or (hieu van)) - hanh dinh cuu thong cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu van)) - hanh dinh cuu thong cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (hieu van)) - hanh dinh cuu thong cong dan toan ban*.