Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
lam cua » nam cua, lam chat
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 ky nang o hoi. ((hieu ve) or (hieu va)) cam xuc ban thanh ((lam cua) or (ly chat)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang o hoi. ((hieu ve) OR (hieu va)) cam xuc ban thanh ((lam cua) OR (ly chat)) viet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang o hoi. ((hieu ve) or (hieu va)) cam xuc ban thanh ((lam cua) or (ly chat)) viet*.