Perhaps you should try some spelling variations:
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
loi roi » loi noi, voi roi, loi gioi
lai roi » lai hoi
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
va dau » va dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang ((lai roi) or (loi roi)). hieu ve cam xuc ((va tinh) or (va dau)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((lai roi) OR (loi roi)). hieu ve cam xuc ((va tinh) OR (va dau)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((lai roi) or (loi roi)). hieu ve cam xuc ((va tinh) or (va dau)) vai cua tre*.