Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
hanh dai » hanh tai, hanh dao, vanh dai
nam thuc » nam thuoc, am thuc, nam thu
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, dam thuc
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
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 ky sang ma hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh dai ((va triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang ma hoi. hieu ve ((cam tuc) OR (nam thuc)) va hanh dai ((va triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky sang ma hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh dai ((va triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky sang ma hoi. hieu ve ((cam tuc) or (nam thuc)) va hanh dai ((va triet) OR (ve triet))*.