Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ban benh » san benh, ban banh, can benh
cao duc » dao duc, cao suc, giao duc
ba benh » va benh, bo benh, bach benh
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, pham duc, nam duoc
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. hieu van ((cam duc) or (cao duc)) ((ban benh) OR (ba benh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. hieu van ((cam duc) OR (cao duc)) ((ban benh) OR (ba benh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu van ((cam duc) or (cao duc)) ((ban benh) OR (ba benh)) vi cua tre*".