Perhaps you should try some spelling variations:
bien cac » vien cac, bien ca, hien cac
dien cac » vien cac, dien cuc, dien sach
ban hang » ngan hang
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
duc ban » duc tan, duc van, dua ban
va cua » va chua, via cua, ma cua
ca cua » co cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. thieu ((bien cac) or (dien cac)) duc ban hang ((va cua) or (ca cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. thieu ((bien cac) OR (dien cac)) duc ban hang ((va cua) OR (ca cua)) triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. thieu ((bien cac) or (dien cac)) duc ban hang ((va cua) or (ca cua)) triet*.