Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sang tao » hang tai
hieu voi » hieu moi, lieu voi, hieu loi
voi pham » vi pham, toi pham, loai pham
phan lap » phan dau
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
tao hoi » tao khoi, tao boi, tay hoi
va phan » van phan, va phat, va phap
cua tu » cua tuc, cua su, cua cu

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 ty sang tao hoi. hieu voi pham duc va phan lap ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty sang tao hoi. hieu voi pham duc va phan lap ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: toc sach ty sang tao hoi. hieu voi pham duc va phan lap ((cua te) or (cua tu))*.