Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
ban benh » san benh, ba benh, ban banh
dua tren » dung tren
cac quoc » cac nuoc, cac cuoc, cao quoc
quoc ban » quoc bao, quoc lan, quoc quan
cuu tre » cua tre, cau tren
te sach » toc sach
qua cac » cua cac
nang xa » nang x, lang xa, nang ma
benh vi » benh va, benh ve, benh li
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang xa hoi. hieu qua cac quoc ban benh vi ((((dua tren) or (cuu tre))) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu qua cac quoc ban benh vi ((((dua tren) OR (cuu tre))) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu qua cac quoc ban benh vi ((((dua tren) or (cuu tre))) or (cau treo))*.