Perhaps you should try some spelling variations:
ban hang » ngan hang
van hanh » van thanh, ban hanh, van anh
cau treo » cau theo, cau tren, cau triet
co sach » bo sach, cuon sach, hoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
va hanh » va thanh, va danh, ban hanh
ve cac » va cac, vien cac
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ty nang x hoi. hieu ve cac luc ((((va hanh) or (ban hang))) or (van hanh)) vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ty nang x hoi. hieu ve cac luc ((((va hanh) OR (ban hang))) OR (van hanh)) vi cau treo.
• Adding a wildcard symbol may retrieve word variants: co sach ty nang x hoi. hieu ve cac luc ((((va hanh) or (ban hang))) or (van hanh)) vi cau treo*.