Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ve thanh » le thanh, de thanh, den thanh
cham cuu » cap cuu, chat cua
so sach » so sanh, bo sach, co sach
cua tre » cuu tre, cua triet, dua tren
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cuu ve » cuu va
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: so sach ty ((nang xa) OR (lang xa)) hoi. hieu ve cham cuu ve thanh dai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (lang xa)) hoi. hieu ve cham cuu ve thanh dai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) OR (lang xa)) hoi. hieu ve cham cuu ve thanh dai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) OR (lang xa)) hoi. hieu ve cham cuu ve thanh dai ((cua tre) or (cua te))*.