Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cham cuu » cap cuu, chat cua
ve thanh » le thanh, de thanh, den thanh
so sach » so sanh, bo sach, co sach
sach tu » sach thu, cach tu, sach ty
mang xa » lang xa, mang may, dang xay
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
cuu ve » cuu va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tu ((mang xa) or (sang ma)) hoi. hieu ve cham cuu ve thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu ((mang xa) OR (sang ma)) hoi. hieu ve cham cuu ve thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach tu ((mang xa) or (sang ma)) hoi. hieu ve cham cuu ve thanh dai cua tre*.