Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao suc, chat xuc
cao duc » dao duc, cao suc, giao duc
van anh » van thanh, tuan anh, van minh
su hien » su kien, su tien, thu hien
anh ve » hanh ve, anh va, anh viet
ve su » va su

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 vu nang xa hoi. hieu va ((cao xuc) or (cao duc)) van anh ve su hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach vu nang xa hoi. hieu va ((cao xuc) OR (cao duc)) van anh ve su hien.
• Adding a wildcard symbol may retrieve word variants: toc sach vu nang xa hoi. hieu va ((cao xuc) or (cao duc)) van anh ve su hien*.