Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, hanh mang, hanh tung
anh tang » anh bang, anh dang, anh nang
van cong » van dong, van phong, phan cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 - ((hanh tang) OR (anh tang)) luan van cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - ((hanh tang) OR (anh tang)) luan van cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - ((hanh tang) OR (anh tang)) luan van cong tac toan cao*.