Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
van dai » vanh dai, van dao, van hai
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
loc va » hoc va
luc va » duc va, tuc va
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu va cam ((luc va) OR (loc va)) ((van dai) OR (lanh dao)) cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu va cam ((luc va) or (loc va)) ((van dai) or (lanh dao)) cua tre*.