Perhaps you should try some spelling variations:
sach ky » sac ky, sach y, sach ty
c_ chua » ca chua, cha chua, chi chua
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
xuc va » duc va, tuc va, luc va
loc va » hoc va, luc va
ve cac » va cac, vien cac

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 ma hoa. hieu ve cac ((xuc va) or (loc va)) thanh ((_ chua) or (c_ chua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoa. hieu ve cac ((xuc va) OR (loc va)) thanh ((_ chua) OR (c_ chua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoa. hieu ve cac ((xuc va) or (loc va)) thanh ((_ chua) or (c_ chua)) tre*.