Perhaps you should try some spelling variations:
su sach » so sach, vu sach
va dinh » van dinh, va kinh, va tinh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
va dao » ca dao
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam

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: su sach ty ((nang x) OR (nang ma)) hoi. hieu ve cam xuc ((va dinh) OR (va dao)) vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang x) or (nang ma)) hoi. hieu ve cam xuc ((va dinh) or (va dao)) vi cua tre*.