Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » thong cong, hang cong, nhung don
hanh luan » khanh luan, hang luan, hanh luat
dung cong » dung trong
tran tap » toan tap, tran tan, tran tuan
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 tinh) or (chieu sang)) - hanh luan va ((nhung cong) or (dung cong)) tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tinh) OR (chieu sang)) - hanh luan va ((nhung cong) OR (dung cong)) tan tran tap.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) or (chieu sang)) - hanh luan va ((nhung cong) or (dung cong)) tan tran tap*.