Perhaps you should try some spelling variations:
"espinoza rojas, alvaro g." » "espinoza roca, alvaro g." (Expand Search), "espinoza ramos, alvaro g." (Expand Search), "espinoza rocha, alvaro g." (Expand Search), "espinoza rojas, alvaro d." (Expand Search), "espinoza rojas, alvaro e." (Expand Search), "espinoza rojas, alvaro a." (Expand Search)