Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
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: tu ((sach ty) or (sach thu)) nang xa hoi. hieu ((ve cai) or (va cam)) xuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. hieu ((ve cai) OR (va cam)) xuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang xa hoi. hieu ((ve cai) or (va cam)) xuc va hanh vi cua tre*.