Perhaps you should try some spelling variations:
theo chiet » theo chieu, thep thiet
chiet tach » chieu sach
hanh trang » thanh trung, canh tranh, hanh trinh
hanh tang » anh tang, hanh mang, hanh tung
van cong » van dong, van phong, phan cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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: theo chiet tach - ((hanh tang) OR (hanh trang)) luan van cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chiet tach - ((hanh tang) OR (hanh trang)) luan van cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chiet tach - ((hanh tang) OR (hanh trang)) luan van cong tac toan cau*.