Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
hanh dao » lanh dao, thanh dat, thanh dam
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
y sang » _ sang, duy sang
tuc va » truc va, tuc xa, duc va
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 sang ma hoi. hieu ve cham ((tuc va) or (thuc va)) hanh dao ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y sang ma hoi. hieu ve cham ((tuc va) OR (thuc va)) hanh dao ((va triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach y sang ma hoi. hieu ve cham ((tuc va) or (thuc va)) hanh dao ((va triet) or (ve triet))*.