Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
dinh ba » dinh gia, dinh van, dinh lam
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
ba cua » ban cua, bai cua, bao cua
do va » do van
so va » so van, so vat, su va

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 lang xa hoi. hieu hien cac ((((so va) or (co ma))) or (do va)) dinh ba cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu hien cac ((((so va) OR (co ma))) OR (do va)) dinh ba cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu hien cac ((((so va) or (co ma))) or (do va)) dinh ba cua tre*.