Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
hanh tran » hanh trang, thanh tran, hanh tram
hung cong » hung cuong, phung cong, dung cong
tran van » luan van
phap tu » phan tu, pham tu

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: ((hoc thieu) OR (doi chieu)) sach - hanh tran van ((hung cong) OR (nhung cong)) ban phap tu~.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) sach - hanh tran van ((hung cong) or (nhung cong)) ban phap tu*.