Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
xanh di » danh di, vanh dai, xanh tai
danh vi » hanh vi, dinh vi, danh di
cuu ban » cuu van, cua ban, cuu san
cua tre » cua te, cuu tre, cua triet
cuc ban » cua ban, cac ban, duc ban
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
ve cam » ve cham, ve cac, va cam

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 ky dang xa hoi. hieu ve cam ((cuc ban) or (cuu ban)) ((danh vi) or (xanh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ve cam ((cuc ban) OR (cuu ban)) ((danh vi) OR (xanh di)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve cam ((cuc ban) or (cuu ban)) ((danh vi) or (xanh di)) cua tre*.