Perhaps you should try some spelling variations:
su triet » su viet, ve triet
hanh cao » hanh cac, hanh cat, hanh cad
so sach » so sanh, bo sach, hoc sach
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
co sach » bo sach, cuon sach, hoc sach
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (co sach)) ky sang ma hoi. hieu va cam xuc va hanh cao ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky sang ma hoi. hieu va cam xuc va hanh cao ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ky sang ma hoi. hieu va cam xuc va hanh cao ((su triet) or (su tien))*.