Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
cuu ban » cuu van, cua ban, cuu san
xuc ban » duc ban, cuc ban, quoc ban
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
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: tu sach ty nang x hoi. hieu ve chat ((duc van) or (((xuc ban) or (cuu ban)))) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ve chat ((duc van) OR (((xuc ban) OR (cuu ban)))) anh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ve chat ((duc van) or (((xuc ban) or (cuu ban)))) anh vi cua tre*.