Perhaps you should try some spelling variations:
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
luc va » tuc va, loc va
vi cua » vai cua, di cua
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) OR (su sach)) ky nang x hoi. lieu va cam ((duc va) OR (luc va)) tinh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. lieu va cam ((duc va) or (luc va)) tinh vi cua tre*.