Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
va cam » va cac, va cao, va cai
de cua » le cua, te cua, dieu cua
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 ky nang xa hoi. lieu ((va cam) OR (va cham)) ((duc gia) or (quoc gia)) thanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. lieu ((va cam) OR (va cham)) ((duc gia) OR (quoc gia)) thanh de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. lieu ((va cam) OR (va cham)) ((duc gia) or (quoc gia)) thanh de cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. lieu ((va cam) OR (va cham)) ((duc gia) or (quoc gia)) thanh de cua te*.