Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach thu, xach tay
hanh de » hanh ve, hanh kem
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach uu
de cua » le cua, te cua, dieu 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) OR (hieu qua)) cam tuc van hanh de 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) OR (hieu qua)) cam tuc van hanh de cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) lang xa hoi. ((hieu va) OR (hieu qua)) cam tuc van hanh de cua tre*.