Perhaps you should try some spelling variations:
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
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: te ((sach ty) or (sach tu)) lang xa hoi. hieu va cam ((xuc van) OR (duc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) lang xa hoi. hieu va cam ((xuc van) OR (duc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach tu)) lang xa hoi. hieu va cam ((xuc van) OR (duc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) lang xa hoi. hieu va cam ((xuc van) OR (duc van)) hanh vi cua tre*.