Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, tang cua, thang cua
trung cua » truong cua, trung tuan, trung cap
ban cong » bang cong, van cong, phan cong
cong tac » cong ty
phan dau » phan tu
hang dau » hang va, hang tai
ho hieu » ho chieu, hoi hieu, nho hieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trang cua) OR (trung cua)) ban cong tac ((phan dau) OR (hang dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((trang cua) OR (trung cua)) ban cong tac ((phan dau) or (hang dau))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trang cua) OR (trung cua)) ban cong tac ((phan dau) or (hang dau))*.