Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
phan cua » nhan cua, than cua, phat cua
ban hanh » ban hang
ky lang » ky dang, tay lang
ky tang » ky dang, kho tang, ky trong
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
cua tre » cua te, cuu tre, cua triet
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 ((((ky lang) or (ky nang))) or (ky tang)) xa hoi. hieu ve phan cua ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((((ky lang) OR (ky nang))) OR (ky tang)) xa hoi. hieu ve phan cua ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((((ky lang) or (ky nang))) or (ky tang)) xa hoi. hieu ve phan cua ban hanh vi cua tre*.