Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
cac thuc » cach thuc, cac thu, can thuc
lang xa » lang ha, dang xay, lang van
sach lo » sach dao, sach doi, sach hoi
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
ve cac » va cac, vien cac
sach o » sac o, sach y, mach o

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: tu ((sach o) OR (sach lo)) lang xa hoi. hieu ve cac thuc va hang di ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach o) OR (sach lo)) lang xa hoi. hieu ve cac thuc va hang di ((va triet) or (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach o) OR (sach lo)) lang xa hoi. hieu ve cac thuc va hang di ((va triet) or (ve triet))*.