Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
van cong » van dong, van phong, phan cong
cong tan » cong tac, cong san, cong thanh
tan pha » tan phat, tan ha, 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 - anh tang luan van cong tan pha tan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sang - anh tang luan van cong tan pha tan*.