Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
kham tuc » nham thuc, pham thuc, kham cuoc
hoi dang » hoi dan, hoi lang, hai dang
hoi dong » hop dong, hoat dong, ha dong
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
hieu va » lieu va, hieu qua
va kham » va cham, va khao, va tham
van hoi » van hoa, van hoc, van hoe
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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: toc sach ((hoi dang) OR (hoi dong)) van hoi. hieu va kham tuc va ((danh vi) OR (dinh vi)) cua tre~.
• Adding a wildcard symbol may retrieve word variants: toc sach ((hoi dang) or (hoi dong)) van hoi. hieu va kham tuc va ((danh vi) or (dinh vi)) cua tre*.