Perhaps you should try some spelling variations:
ban nhanh » ban hanh, ban thanh, ban nhan
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
truc ban » thuc ban, truc dan, truc van
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky mang » ky nang, ke mang, ky dang
may hoi » may thoi, tay hoi, mai hoi
ve cham » va cham, ve chat, vu cham
va chat » van chat, va phat, cao chat
hoa su » hoa lu, hoa si, hoa du

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky mang may hoi. hieu ((ve cham) or (va chat)) truc ban nhanh hoa su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky mang may hoi. hieu ((ve cham) OR (va chat)) truc ban nhanh hoa su triet.
• Adding a wildcard symbol may retrieve word variants: so sach ky mang may hoi. hieu ((ve cham) or (va chat)) truc ban nhanh hoa su triet*.