Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
van anh » van thanh, van minh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
cac lo » cac lop, cac co, cac ho
cac bo » bac bo, cac co
tuan » quan, tran, luan

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: tu sach ky nang xa hoi. hieu ve ((cac lo) OR (cac bo)) ((van anh) OR (tuan anh)) vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ve ((cac lo) or (cac bo)) ((van anh) OR (tuan anh)) vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ve ((cac lo) or (cac bo)) ((van anh) OR (tuan anh)) vai cuu tre*.