Perhaps you should try some spelling variations:
ban hang » ngan hang
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu du » hien du, hieu su, hieu qua
hiem du » hien du, diem du, hiem duoc
x hoi » xa hoi, o hoi, x ho
ve su » va su

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

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