Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
su sach » so sach, vu sach
dao tuc » dao duc
doi cua » dai cua, hoi cua
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
dau tuc » dau tu, cau truc, dau nuoc
hang xa » hoang xa, hang va, hang ca
tu hang » thu hang, tu hanh, tu hung

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 tu hang xa hoi. lieu va ((dau tuc) or (dao tuc)) ((van hanh) OR (van anh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu hang xa hoi. lieu va ((dau tuc) OR (dao tuc)) ((van hanh) OR (van anh)) doi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu hang xa hoi. lieu va ((dau tuc) or (dao tuc)) ((van hanh) OR (van anh)) doi cua tre*".