Perhaps you should try some spelling variations:
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
ban nhanh » ban hanh, ban thanh, ban nhan
tu tuong » tu dong
truc ban » thuc ban, truc dan, truc van
va chat » van chat, va phat, cao chat
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, lai hoi
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
ve cham » va cham, ve chat, vu cham
hoa tu » hoa lu, hoa du, hoa su

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 tang) OR (ky dang)) mai hoi. hieu ((ve cham) or (va chat)) truc ban nhanh hoa tu tuong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky tang) OR (ky dang)) mai hoi. hieu ((ve cham) OR (va chat)) truc ban nhanh hoa tu tuong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky tang) OR (ky dang)) mai hoi. hieu ((ve cham) or (va chat)) truc ban nhanh hoa tu tuong".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky tang) OR (ky dang)) mai hoi. hieu ((ve cham) or (va chat)) truc ban nhanh hoa tu tuong*.