Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
sang tao » hang tai
phan lap » phan dau
ky sang » ky nang, ky dang, ky tang
va phan » van phan, va phat, va phap
lap cua » lai cua, tap cua, lam cua
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham
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) or (doc sach)) ky sang tao boi. hieu v pham duc va phan lap cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky sang tao boi. hieu v pham duc va phan lap cua te.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky sang tao boi. hieu v pham duc va phan lap cua te*.