Perhaps you should try some spelling variations:
hanh di » hanh de, hang di, danh di
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach thu, xach tay
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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)) nang xa hoi. hieu va cam tuc va ((hanh di) OR (hanh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach tu)) nang xa hoi. hieu va cam tuc va ((hanh di) OR (hanh vi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) nang xa hoi. hieu va cam tuc va ((hanh di) OR (hanh vi)) cua tre*.