Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than tap » toan tap, han tap, phan tap
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: theo chu sach - ((hanh trinh) OR (canh tranh)) ((va dung) OR (van dung)) cong tan than tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ((hanh trinh) or (canh tranh)) ((va dung) OR (van dung)) cong tan than tap~".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh trinh) or (canh tranh)) ((va dung) OR (van dung)) cong tan than tap*.