Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
dang xa » dang xay, dang ha, dang va
cac tuc » cac toc, cac tu, cac tac
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((dang xa) OR (lang xa)) hoi. hieu ve cac tuc va hang di ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((dang xa) OR (lang xa)) hoi. hieu ve cac tuc va hang di ((va triet) or (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach y ((dang xa) OR (lang xa)) hoi. hieu ve cac tuc va hang di ((va triet) or (ve triet))*.