Perhaps you should try some spelling variations:
theo chiet » theo chieu, thep thiet
chiet tach » chieu sach
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
hach toan » thanh toan, manh toan
van cong » van dong, van phong, phan cong
tac toan » tap toan, tam toan, tich toan

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 luan van cong ((tac toan) OR (hach toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chiet tach - hanh tang luan van cong ((tac toan) OR (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo chiet tach - hanh tang luan van cong ((tac toan) OR (hach toan)) cau*.