Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
van nang » van quang, van ban, van dong
cham luc » cham soc, nhan luc, cham cuu
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
luc va » duc 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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) van nang x hoi. hieu va cham luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) van nang x hoi. hieu va cham luc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) van nang x hoi. hieu va cham luc va hanh vi cua tre*.