Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
duc ban » duc tan, duc van, dua ban
xuc ban » cuc ban, quoc ban, xuat ban
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
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 ((lang xa) or (lang ha)) hoi. hieu ve cam ((xuc ban) or (duc ban)) manh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (lang ha)) hoi. hieu ve cam ((xuc ban) OR (duc ban)) manh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) or (lang ha)) hoi. hieu ve cam ((xuc ban) or (duc ban)) manh hai cua tre*.