Perhaps you should try some spelling variations:
nhung chong » nhung cong, nhung phong, nhung phuong
luan nhung » luan chung, luan hung, quan nhung
hieu manh » chieu xanh, hieu nganh, dieu hanh
chong tac » cong tac, chong tham, phong tuc
doc hieu » toc thieu, hoc thieu, hoc hien
anh tang » anh bang, anh dang, anh sang
anh nang » ganh nang, anh bang, anh dang
than cau » toan cau, than cap, thanh chau
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 manh - ((anh tang) or (anh nang)) luan nhung chong tac ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((anh tang) OR (anh nang)) luan nhung chong tac ((than cau) OR (phan cau))*.