Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
tu sach » thu sach, su sach, te sach
duc ban » duc tan, duc van, dua ban
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
va dao » ca dao
y nang » ky nang, ly nang, v nang
ve dao » de dao, ve bao, te dao
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu ((ve dao) or (va dao)) duc ban thanh tai ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((ve dao) OR (va dao)) duc ban thanh tai ((cua tre) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((ve dao) or (va dao)) duc ban thanh tai ((cua tre) or (cua tu))*.