Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sang tao » hang tai
cham cuu » cap cuu, chat cua
ban than » ban thanh, van thanh, ban hang
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cua tre » cuu tre, cua triet, dua tren
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 ty sang tao boi. hieu ve cham cuu ((ban than) or (ban phap)) lap ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty sang tao boi. hieu ve cham cuu ((ban than) OR (ban phap)) lap ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach ty sang tao boi. hieu ve cham cuu ((ban than) or (ban phap)) lap ((cua tre) or (cua te))*.