Perhaps you should try some spelling variations:
ban hang » ngan hang
cham cuu » cap cuu, chat cua
va cham » va chat, va tham
cuu ban » cuu van, cua ban, cuu san
hieu va » lieu va, hieu qua
van hoi » van hoa, van hoc, van hoe
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky lang) or (ky dang)) van hoi. hieu va cham cuu ban hang ((vi cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky dang)) van hoi. hieu va cham cuu ban hang ((vi cua) OR (dai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) or (ky dang)) van hoi. hieu va cham cuu ban hang ((vi cua) or (dai cua)) triet*.