Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhung cong » dung cong, thong cong, hang cong
hanh dung » thanh dung, anh dung, hanh dong
doc hieu » toc thieu, hoc thieu, hoc hien
dung cua » dung luan, dung cho
dan phan » doan phan, dan chan, van phan
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 nganh - hanh dung cua ((nhung cong) or (trong cong)) dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - hanh dung cua ((nhung cong) OR (trong cong)) dan phan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - hanh dung cua ((nhung cong) or (trong cong)) dan phan cau*.