Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
cham duc » pham duc, cham soc, pham duy
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va
xang xa » lang xa, mang xa, ang xa
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) or (sach y)) xang xa hoi. ((hieu va) or (hieu qua)) cham duc van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) xang xa hoi. ((hieu va) OR (hieu qua)) cham duc van thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach y)) xang xa hoi. ((hieu va) or (hieu qua)) cham duc van thanh vi cua tre*.