Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van dinh » van minh, van dich, va dinh
dinh duc » minh duc, ninh duc, tinh duc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam luc » cam xuc
cau luc » cau truc, cau phuc
duc cuu » duc suu
cuu tre » cua tre, cau tren, cau treo

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 ky nang xa hoi. hieu va ((cam luc) or (cau luc)) van dinh duc cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. hieu va ((cam luc) OR (cau luc)) van dinh duc cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu va ((cam luc) or (cau luc)) van dinh duc cuu tre*.