Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hai cua » thai cua, dai cua, hoi cua
anh hai » lanh hai, manh hai, anh thai
duc ban » duc tan, duc van, dua ban
xuc ban » cuc ban, quoc ban, xuat ban
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
tay hoi » tay ho, tao hoi, tay thai
xay hoi » xa hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
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: su sach ky dang ((xay hoi) or (tay hoi)). hieu ve cam ((xuc ban) OR (duc ban)) anh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang ((xay hoi) OR (tay hoi)). hieu ve cam ((xuc ban) OR (duc ban)) anh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang ((xay hoi) or (tay hoi)). hieu ve cam ((xuc ban) OR (duc ban)) anh hai cua tre*".