Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cac hocp » cac hop, bac hoc, cac lop
hanh hai » thanh hai, nhanh hai, hang hai
hieu va » lieu va, hieu qua
cac hoc » cach hoc, cac hop, bac hoc
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
cac co » cac cong
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu va ((((cac hoc) or (cac hocp))) or (cac co)) va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu va ((((cac hoc) OR (cac hocp))) OR (cac co)) va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu va ((((cac hoc) or (cac hocp))) or (cac co)) va hanh hai cua tre*.