Perhaps you should try some spelling variations:
dinh toi » dinh tri, dinh thi, dinh moi
su sach » so sach, vu sach
toi cua » troi cua, tri cua, hoi cua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cac » va cac, vien cac
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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 ((nang xa) OR (nang x)) hoi. hieu ve cac ((xuc va) or (tuc va)) dinh toi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang x)) hoi. hieu ve cac ((xuc va) OR (tuc va)) dinh toi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang x)) hoi. hieu ve cac ((xuc va) or (tuc va)) dinh toi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang x)) hoi. hieu ve cac ((xuc va) or (tuc va)) dinh toi cua te*.