Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hanh luan » khanh luan, hang luan, hanh luat
dang cong » dung cong
tran tan » tran tuan, tran van, tran thanh
luan va » luan van, luat va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) or (chieu sang)) - hanh luan va ((nhung cong) or (dang cong)) tan tran tan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - hanh luan va ((nhung cong) OR (dang cong)) tan tran tan.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sang)) - hanh luan va ((nhung cong) or (dang cong)) tan tran tan*.