Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac xuc » cac nuoc, chat xuc, cac cuoc
cua tuc » cua duc, cua tu, cua thuoc
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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: toc sach v nang ma hoa. hieu ve ((cac xuc) or (cam xuc)) van hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang ma hoa. hieu ve ((cac xuc) OR (cam xuc)) van hanh vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: toc sach v nang ma hoa. hieu ve ((cac xuc) or (cam xuc)) van hanh vi cua tuc*.