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
van phan » van phong, van thanh, luan phan
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
va phan » va phat, va phap, hoa phan
lam cua » nam cua, lam chat
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 hoi. hieu v pham duc ((va phan) OR (van phan)) lam cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky sang tao hoi. hieu v pham duc ((va phan) OR (van phan)) lam cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) ky sang tao hoi. hieu v pham duc ((va phan) OR (van phan)) lam cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky sang tao hoi. hieu v pham duc ((va phan) OR (van phan)) lam cua te*.