Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
bang xa » lang xa, bang va, ang xa
mang xa » lang xa, mang may, dang xay
tuc van » thuc van, truc van, tuc va
cua tre » cua te, cuu tre, cua triet
va dao » ca dao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thieu ((bang xa) OR (mang xa)) hoi. lieu ((va dau) or (va dao)) tuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thieu ((bang xa) OR (mang xa)) hoi. lieu ((va dau) OR (va dao)) tuc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thieu ((bang xa) OR (mang xa)) hoi. lieu ((va dau) or (va dao)) tuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach thieu ((bang xa) OR (mang xa)) hoi. lieu ((va dau) or (va dao)) tuc van hanh vi cua tre*.