Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
nang cho » nang chon, ngang cho, nang cao
chat xuc » chat huu, cam xuc, chao xu
cac xuc » cam xuc, cac nuoc, cac cuoc
vai cua » dai cua, hai cua, lai cua
cua cay » cua cac
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
tu nang » tru nang, tu nong, tu nano

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