Perhaps you should try some spelling variations:
ban hang » ngan hang
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
van anh » van thanh, tuan anh, van minh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
vi cua » di cua

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 ve cac xuc ((ban hang) or (van anh)) ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu ve cac xuc ((ban hang) OR (van anh)) ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu ve cac xuc ((ban hang) or (van anh)) ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu ve cac xuc ((ban hang) or (van anh)) ((vi cua) OR (vai cua)) tre*.