Perhaps you should try some spelling variations:
ban hang » ngan hang
ve triet » va trien, su triet
su sach » vu sach
so sach » so sanh, bo sach, co sach
ly nang » ky nang, ly hang, ly vang
hieu du » hien du, hieu su, hiem du
du cam » tu cam, xu cam, dung cam
x hoi » xa hoi, o hoi, x ho
ve ve » de ve, va ve, ke ve

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 du cam xuc ((van ban) or (ban hang)) ve ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ly nang x hoi. hieu du cam xuc ((van ban) OR (ban hang)) ve ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ly nang x hoi. hieu du cam xuc ((van ban) or (ban hang)) ve ve triet*".