Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
pnhan tai » pham tai, nhan tao, han tai
tang cua » mang cua, hang cua, tang luan
cong tac » cong ty
nhan tai » hang tai, van tai, toan tai
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh tang cua nhung cong tac ((nhan tai) or (pnhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tang cua nhung cong tac ((nhan tai) OR (pnhan tai)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tang cua nhung cong tac ((nhan tai) or (pnhan tai))*.