Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
su triet » su viet, su tien
ve triet » va trien
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ma hoi » mai hoi, xa hoi, ma hoa
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: so sach ky nang ma hoi. hieu ve cham tuc va hanh va ((su triet) OR (ve triet))~.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ma hoi. hieu ve cham tuc va hanh va ((su triet) or (ve triet))*.