Perhaps you should try some spelling variations:
luu van » cuu van, luan van, luu hanh
xuc van » duc van, luc van, vuc van
sach tu » sach thu, sach ty, sach uu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (cach tu)) nang xa hoi. hieu va cao ((xuc van) OR (luu van)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) OR (cach tu)) nang xa hoi. hieu va cao ((xuc van) or (luu van)) hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) OR (cach tu)) nang xa hoi. hieu va cao ((xuc van) or (luu van)) hanh vi cua tre*.