Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
xang cho » sang cho, hang cho, tang cho
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
sach tu » sach thu, cach tu, sach ty
cua cau » cua cac, cua cay, cua can
cua chu » sua chua
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
tu xang » ty xang, tu lang, tu quang

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 tu xang cho hoc. hieu ve ((cac xuc) OR (cac nuoc)) van hanh vi ((cua cau) OR (cua chu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu xang cho hoc. hieu ve ((cac xuc) OR (cac nuoc)) van hanh vi ((cua cau) or (cua chu))~".
• Adding a wildcard symbol may retrieve word variants: toc sach tu xang cho hoc. hieu ve ((cac xuc) OR (cac nuoc)) van hanh vi ((cua cau) or (cua chu))*.