Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
bo benh » so benh, o benh, co benh
ba benh » va benh, bach benh, tai benh
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ty hang
da duoc » tao duoc, hoa duoc
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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: thu sach ty nang x hoi. lieu va ((da duoc) OR (cao duc)) ((ba benh) OR (bo benh)) di cua tre~.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang x hoi. lieu va ((da duoc) or (cao duc)) ((ba benh) or (bo benh)) di cua tre*.