Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
te sach » toc sach
cac xuc » cam xuc, chat xuc, cac cuoc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cua cau » cua cac, cua chu, cua cay
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) ky nang ma hoi. hieu va ((cac xuc) or (cac nuoc)) van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ky nang ma hoi. hieu va ((cac xuc) OR (cac nuoc)) van hanh vi cua cau.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ky nang ma hoi. hieu va ((cac xuc) or (cac nuoc)) van hanh vi cua cau*.