Perhaps you should try some spelling variations:
ban hang » ngan hang
tuc ban » thuc ban, truc ban, tu ban
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
su sach » vu sach
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
vi cua » vai cua
di cua » dai cua, doi cua, de cua
va cam » va cham, va cac, va cao
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: ((su sach) OR (so sach)) ly nang x hoi. hieu va cam tuc ban hang ((vi cua) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ly nang x hoi. hieu va cam tuc ban hang ((vi cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ly nang x hoi. hieu va cam tuc ban hang ((vi cua) or (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ly nang x hoi. hieu va cam tuc ban hang ((vi cua) or (di cua)) triet*.