Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
hoc chiet » hoc thiet, hoc nhiet, hoc hien
san thanh » ban thanh, van thanh, son thanh
thanh cao » thanh ca, thanh cac, thanh thao
van dung » van dong, xay dung
cong san » cong tac
va dung » va duong, vat dung, va ung

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: hoc chiet tach - hanh trinh ((va dung) OR (((van dung) OR (tin dung)))) cong san thanh cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh trinh ((va dung) or (((van dung) OR (tin dung)))) cong san thanh cao~".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh ((va dung) or (((van dung) OR (tin dung)))) cong san thanh cao*.