Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sang tao » hang tai
tao khoi » tao hoi, thao khoa, lao khoa
dinh lai » dinh lam, dinh lap, dinh tai
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
ve pham » vi pham, v pham, ve phat
ve phan » va phan, ke phan, ve phat
va dinh » van dinh, va kinh, va tinh
lai cua » dai cua, hai cua, lai chau
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: toc sach ky sang tao khoi. hieu ((ve pham) or (ve phan)) duc va dinh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky sang tao khoi. hieu ((ve pham) OR (ve phan)) duc va dinh lai cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ky sang tao khoi. hieu ((ve pham) or (ve phan)) duc va dinh lai cua te*.