Perhaps you should try some spelling variations:
ban nhanh » ban hanh, ban thanh, ban nhan
cham truc » nham thuc, pham thuc, nam truc
nhanh ha » thanh hoa, thanh hai, khanh hoa
va trien » va truyen, va thiet, va tuyen
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
ha va » ha van, hoa va, nha va

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 ma hoi. hieu ve ((cham truc) or (cau truc)) ban nhanh ha va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky tang ma hoi. hieu ve ((cham truc) OR (cau truc)) ban nhanh ha va trien.
• Adding a wildcard symbol may retrieve word variants: so sach ky tang ma hoi. hieu ve ((cham truc) or (cau truc)) ban nhanh ha va trien*.