Perhaps you should try some spelling variations:
sach ly » sach y, sach hay, sach luu
sach lo » sach dao, sach doi, sach hoi
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc 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: vu ((((sach ly) OR (sach lo))) or (sach ty)) lang xa hoi. hieu va cac luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((((sach ly) OR (sach lo))) OR (sach ty)) lang xa hoi. hieu va cac luc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((((sach ly) OR (sach lo))) or (sach ty)) lang xa hoi. hieu va cac luc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu ((((sach ly) OR (sach lo))) or (sach ty)) lang xa hoi. hieu va cac luc va hanh vi cua tre*.