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
ban ban » ban banh, ban dan, ban can
can ban » toan ban
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
va cuu » va cau, va chu, va huu

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 cam xuc ((((ban ban) OR (can ban))) OR (van ban)) va cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ve cam xuc ((((ban ban) OR (can ban))) or (van ban)) va cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ve cam xuc ((((ban ban) OR (can ban))) or (van ban)) va cuu tre*.