Perhaps you should try some spelling variations:
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
ban nhanh » ban hanh, ban thanh, ban nhan
su triet » su viet, su tien, ve triet
truc ban » thuc ban, truc dan, truc van
va chat » van chat, va phat, cao chat
so sach » so sanh, bo sach, co sach
may hoi » may thoi, tay hoi, mai hoi
ky dang » ky nang, ky danh
ky mang » ky nang, ke mang, ky tang
ve cham » va cham, ve chat, vu cham
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) OR (ky dang)) 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) OR (ky dang)) may hoi. hieu ((ve cham) OR (va chat)) truc ban nhanh hoa su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky mang) OR (ky dang)) 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) OR (ky dang)) may hoi. hieu ((ve cham) or (va chat)) truc ban nhanh hoa su triet*.