Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
anh di » danh di, xanh di, anh d
o hoi » co hoi, o hoc, o hai

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 ky nang ((o hoi) or (xa hoi)). hieu ve cac xuc van anh di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hoi) OR (xa hoi)). hieu ve cac xuc van anh di ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hoi) or (xa hoi)). hieu ve cac xuc van anh di ((cua tre) or (cuu tre))*.