Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
luan nhung » luan chung, luan hung, quan nhung
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
hoi hieu » hoi phieu, hoi tieu, moi hieu
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan cau » phan dau, phan cac, phan tu
ho hieu » ho chieu, nho hieu, vo hieu
co hieu » cao hieu, doc 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) OR (co hieu))) OR (hoi hieu)) lang - hanh tang luan nhung cong tac phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((ho hieu) OR (co hieu))) or (hoi hieu)) lang - hanh tang luan nhung cong tac phan cau~".
• Adding a wildcard symbol may retrieve word variants: ((((ho hieu) OR (co hieu))) or (hoi hieu)) lang - hanh tang luan nhung cong tac phan cau*.