Perhaps you should try some spelling variations:
thanh oai » thanh hai, thanh tai, thanh toan
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac tu » cac thu, cach tu, cac du
oai su » loai su, lai su, oi su

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 ((lang xa) or (van xay)) hoi. hieu va cac tu va thanh oai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((lang xa) OR (van xay)) hoi. hieu va cac tu va thanh oai su triet.
• Adding a wildcard symbol may retrieve word variants: so sach ty ((lang xa) or (van xay)) hoi. hieu va cac tu va thanh oai su triet*.