Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, nam thu, nam tu
thanh do » thanh de, thanh hoa, thanh loi
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
tao hoi » tao khoi, tao boi, tay hoi
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 hoi. hieu van ((nam thuc) or (am thuc)) day ((thanh do) or (thanh pho)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty sang tao hoi. hieu van ((nam thuc) OR (am thuc)) day ((thanh do) OR (thanh pho)) cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ty sang tao hoi. hieu van ((nam thuc) or (am thuc)) day ((thanh do) or (thanh pho)) cua te*.