Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
thanh d » thanh de, thanh do, thanh _
thu van » thuc van, thuy van, tu van
su sach » so sach, vu sach
tang ma » mang may, tang van
ve cham » va cham, ve chat, vu cham
y tang » ky tang, 6 tang, 7 tang
ve cai » va cai, ve cac, ve tai
ma hoi » mai hoi, xa hoi, ma hoa

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 y tang ma hoi. hieu ((ve cai) or (ve cham)) thu van thanh d ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y tang ma hoi. hieu ((ve cai) OR (ve cham)) thu van thanh d ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y tang ma hoi. hieu ((ve cai) or (ve cham)) thu van thanh d ((cua triet) OR (su triet))*".