Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cay phoi » cap phoi, tay hoi, cay cho
day cua » dai cua
dan day » da day, dan dat, dan da
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, gay thoi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky dang ((xay hoi) or (cay phoi)). ((hieu ve) or (lieu va)) cam xuc va dan day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky dang ((xay hoi) OR (cay phoi)). ((hieu ve) OR (lieu va)) cam xuc va dan day cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky dang ((xay hoi) or (cay phoi)). ((hieu ve) or (lieu va)) cam xuc va dan day cua tre*.