Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
thong cua » thong quan, thong tu, huong cua
tang cua » mang cua, tang luan, quang cua
hang cua » mang cua, hang ca, huong cua
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan cau » phan dau, phan cac, phan tu
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 ((((tang cua) OR (thong cua))) OR (hang cua)) nhung cong tac phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((((tang cua) OR (thong cua))) or (hang cua)) nhung cong tac phan cau~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((((tang cua) OR (thong cua))) or (hang cua)) nhung cong tac phan cau*.