Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
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
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de 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: te ((sach ty) OR (sach tu)) lang xa hoi. hieu va cam tuc van hanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) lang xa hoi. hieu va cam tuc van hanh di cua tre*.