Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, nhung don
lieu tinh » trieu tinh, diep tinh, bien tinh
hang cong » dang cong, hang nong, bang cong
lang luan » tang luan, hang luan, bang luan
trang va » tran van, hang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (lieu tinh)) - hanh trang va ((nhung cong) OR (hang cong)) lang luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (lieu tinh)) - hanh trang va ((nhung cong) OR (hang cong)) lang luan van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (lieu tinh)) - hanh trang va ((nhung cong) OR (hang cong)) lang luan van".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (lieu tinh)) - hanh trang va ((nhung cong) OR (hang cong)) lang luan van*.