Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh duc » minh duc, ninh duc, tinh duc
nhan luc » nang luc
cham luc » cham soc, cham cuu, chat lua
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
nang xa » lang xa, nang ma, mang xa
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky ((nang xa) OR (nang x)) hoi. hieu va ((cham luc) OR (nhan luc)) va dinh duc cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky ((nang xa) OR (nang x)) hoi. hieu va ((cham luc) or (nhan luc)) va dinh duc cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ky ((nang xa) OR (nang x)) hoi. hieu va ((cham luc) or (nhan luc)) va dinh duc cuu tre*.