Perhaps you should try some spelling variations:
su triet » su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
su sach » vu sach
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
su viet » so viet
nang ma » tang ma, sang ma, nang cao
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
tro va » tao va, tho va, tro ba
ve cac » va cac, vien cac

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: ((su sach) OR (so sach)) ky nang ma hoi. hieu ve cac tro va hanh vai ((su triet) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang ma hoi. hieu ve cac tro va hanh vai ((su triet) OR (su viet))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang ma hoi. hieu ve cac tro va hanh vai ((su triet) OR (su viet))*.