Perhaps you should try some spelling variations:
hanh di » hanh de, hang di, danh di
sach tu » sach thu, cach tu, sach uu
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
nong xa » song xa, dong xa, nong va
sach ty » sach y, sach thu, xach tay
cam tu » cam thu, nam tu, dam tu
tu van » tu va
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 tu) OR (sach ty)) nong xa hoi. hieu va cam tu van ((hanh di) OR (hanh vi)) cuu tre~.
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) or (sach ty)) nong xa hoi. hieu va cam tu van ((hanh di) or (hanh vi)) cuu tre*.