Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham duc » pham duc, pham duy, phan duc
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di 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 ty xang xa hoi. hieu va ((cham duc) OR (cham soc)) ban thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang xa hoi. hieu va ((cham duc) OR (cham soc)) ban thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu va ((cham duc) OR (cham soc)) ban thanh vi cua tre*.