strongly nonlinear algebraic equations

Hello;I want to solve the following system.the result is not what I need.

with(linalg):

f1:=b*R + b*S - d*S - bcd*I1*S - bcd*I2*S - (e*g*S)/K - (g*I1*S)/K - ( g*I2*S)/K - (g*R*S)/K - (g*S^2)/K=0;

f2:=-d*e - (e^2*g)/K - (e*g*I1)/K - (e*g*I2)/K - (e*g*R)/K + bcd*I1*S +  bcd*I2*S - (e*g*S)/K - e*scd1=0;

f3:=-d*I1 - (e*g*I1)/K - (g*I1^2)/K - (g*I1*I2)/K - (g*I1*R)/K - ( g*I1*S)/K + e*scd1 - e*f*scd1 - I1*scd2=0;

f4:=-acd*I2 - d*I2 - (e*g*I2)/K - (g*I1*I2)/K - (g*I2^2)/K - ( g*I2*R)/K - (g*I2*S)/K + e*f*scd1=0;

f5:=-d*R - (e*g*R)/K - (g*I1*R)/K - (g*I2*R)/K - (g*R^2)/K - (g*R*S)/K +  I1*scd2=0;

solve({f1,f2,f3,f4,f5},{S,e,I1,I2,R});