Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu hang » thi hang, thuc hanh, thu huong
van hanh » van thanh, ban hanh, van ban
su sach » so sach, vu sach
hang xa » hoang xa, hang va, hang ca
dau tuc » dau tu, dao tuc, cau truc
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
va dau » va dao
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu hang xa hoi. lieu va dau tuc ((van hanh) or (van anh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu hang xa hoi. lieu va dau tuc ((van hanh) OR (van anh)) di cua tre*.