Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nang lai » nang tai, mang lai, nang cai
su viet » so viet
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
lai hoi » dai hoi, lai hoa, lai roi
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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