Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
xa hanh » xa thanh, xa khanh, va hanh
sach ty » sach y, sach tu, xach tay
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
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 cam) or (va cam)) tuc xa 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 cam) OR (va cam)) tuc xa hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) nang xa hoi. hieu ((ve cam) or (va cam)) tuc xa hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) nang xa hoi. hieu ((ve cam) or (va cam)) tuc xa hanh vi cua tre*.