Perhaps you should try some spelling variations:
chieu tach » chieu sach, chiu trach, chieu tinh
chiet tach » chieu sach
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
hach toan » thanh toan, manh toan
tang cua » mang cua, hang cua, tang luan
cua dung » cua dang, cua dong, qua dung
tac toan » tap toan, tam toan, tich toan

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tach) OR (chiet tach)) - hanh tang cua dung cong ((tac toan) OR (hach toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tach) or (chiet tach)) - hanh tang cua dung cong ((tac toan) OR (hach toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tach) or (chiet tach)) - hanh tang cua dung cong ((tac toan) OR (hach toan)) cau*.