Perhaps you should try some spelling variations:
thanh do » thanh de, thanh pho, thanh hoa
su sach » so sach, vu sach
dang xa » dang xay, lang xa, dang ha
va chat » van chat, va phat, cao chat
huu tre » huu tri, cuu tre, huu them
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
do huu » dao huu, so huu

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 _ dang xa hoi. lieu va chat ((xuc va) or (tuc va)) thanh do huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach _ dang xa hoi. lieu va chat ((xuc va) OR (tuc va)) thanh do huu tre*.