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
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac xuc » cam xuc, chat xuc, cac cuoc
vai cua » dai cua, hai cua, lai cua
cua cau » cua cac, cua chu, cua cay
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang

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 ((ty nang) or (ty hang)) cho hoc. hieu ve ((cac xuc) OR (cac nuoc)) van hanh vai cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty nang) OR (ty hang)) cho hoc. hieu ve ((cac xuc) OR (cac nuoc)) van hanh vai cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ty nang) or (ty hang)) cho hoc. hieu ve ((cac xuc) OR (cac nuoc)) van hanh vai cua cau*".