First of all I wish to know what the top colleges in Vizag are. However, popular colleges where you stand a chance of admissions are 

Andhra Loyola Institute of Engineering and Technology, Vijayawada

CHAITANYA ENGINEERING COLLEGE, VISAKHAPATNAM

DR L BULLAYYA COLL OF ENGG FOR WOMEN, VISAKHAPATNAM

G V P COLLEGE FOR DEGREE AND PG COURSES, VISAKHAPATNAM

GAYATHRI VIDYA PARISHAD COLL OF ENGG FOR WOMEN, VISAKHAPATNAM

GAYATHRI VIDYA PARISHAD COLL. OF ENGINEERING, VISAKHAPATNAM

PYDAH COLLEGE OF ENGG. AND TECHNOLOGY, VISAKHAPATNAM

VIGNANS INSTT OF ENGINEERING FOR WOMEN, VISAKHAPATNAM

Pls note last year seats were available in these colleges. For the most popular ones, they were given in the last rounds of counselling and for some in the first round itself. I think you should check the placement records, faculty and infrastructure of the college before you decide to join.

hii

you will definately get sce in top colleges in Vizag like 

Raghu Engineering College - [REC] - Visakhapatnam

Vignan's Institute of Information Technology - [VIIT] - Visakhapatnam

many more 

all the best