Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang xa hoi. hieu qua cac duc tan hanh vi ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu qua cac duc tan hanh vi ((cua tre) OR (cua te))*.