Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
anh thai » anh thi, anh tai, nhanh thai
cac xuc » cam xuc, cac nuoc, chat xuc
cuu tre » cua tre, cau tren
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
o hai » co hai, so hai, o lai
o ha » y ha, _ ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ((o ha) or (o hai)). hieu ve cac xuc van anh thai ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((o ha) OR (o hai)). hieu ve cac xuc van anh thai ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((o ha) or (o hai)). hieu ve cac xuc van anh thai ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((o ha) or (o hai)). hieu ve cac xuc van anh thai ((cuu tre) OR (cau treo))*.