Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
van cong » van dong, van phong, phan cong
cong dan » cong san, cong tan, huong dan
dan pha » dan phan, dan pho, ban pha
pha tan » pha tap, pha ban, pha san

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) OR (toc thieu)) sang - hanh tang luan van cong dan pha tan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (toc thieu)) sang - hanh tang luan van cong dan pha tan*".