Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
nhanh ha » thanh hoa, thanh hai, khanh hoa
va nhanh » va thanh, va hanh, va nhan
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
tuc va » thuc va, truc va, tuc xa
ha cua » hoa cua, hai cua, nha cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ky nang ((mai hoi) or (lai hoi)). hieu ((ve cham) or (va cham)) tuc va nhanh ha cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky nang ((mai hoi) OR (lai hoi)). hieu ((ve cham) OR (va cham)) tuc va nhanh ha cua te.
• Adding a wildcard symbol may retrieve word variants: doc sach ky nang ((mai hoi) or (lai hoi)). hieu ((ve cham) or (va cham)) tuc va nhanh ha cua te*.