Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang mai » nang ma, nang tai, lang mai
van hanh » van thanh, ban hanh, van anh
cua tuc » cua duc, cua thuoc, luat tuc
cac xuc » cac nuoc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
cua tu » cua su, cua cu, cua te

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 v nang mai hoi. hieu ve ((cac xuc) OR (cam xuc)) van hanh vi ((cua tuc) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v nang mai hoi. hieu ve ((cac xuc) OR (cam xuc)) van hanh vi ((cua tuc) or (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: toc sach v nang mai hoi. hieu ve ((cac xuc) OR (cam xuc)) van hanh vi ((cua tuc) or (cua tu))*.