Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
vu nang » vuc nang, va nang, vu dang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
v nang » va nang, van nang, voi nang
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su

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