Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
doc hieu » toc thieu, hoc thieu, hoc hien
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu lang - hanh ((tang cua) or (mang cua)) hang cong dan ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - hanh ((tang cua) OR (mang cua)) hang cong dan ((than cap) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - hanh ((tang cua) or (mang cua)) hang cong dan ((than cap) or (phan cau))*.