Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su viet
hanh cat » hanh cac, hanh luat, nhanh cay
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
su tien » su kien, su hien, tu tieng
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc 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 ky sang ma hoi. hieu va cam luc va hanh cat ((((su triet) OR (ve triet))) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky sang ma hoi. hieu va cam luc va hanh cat ((((su triet) OR (ve triet))) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky sang ma hoi. hieu va cam luc va hanh cat ((((su triet) OR (ve triet))) or (su tien))".
• Adding a wildcard symbol may retrieve word variants: so sach ky sang ma hoi. hieu va cam luc va hanh cat ((((su triet) OR (ve triet))) or (su tien))*.