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
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua tuc » cua duc, cua thuoc, luat tuc
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua su, cua cu, cua te

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 y nang ma hoi. hieu qua cac xuc van hanh vi ((cua tuc) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu qua cac xuc van hanh vi ((cua tuc) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. hieu qua cac xuc van hanh vi ((cua tuc) or (cua tu))*.