speaking

How I can improve my speaking last time I got5 and it is not sufficient

Speaking is not only related to talking about something. It is related to writing, reading and listening too.

Suggested:
1. Do more intensive listening:
http://www.testbig.com/ielts-basic-listening-practice
http://www.testbig.com/ielts-intermediate-listening-practice
http://www.testbig.com/ielts-advanced-listening-practice

2. Do more extensive listening, like:
Listen to radios like VOA, BBC, Watch TVs like CNN

3. Find a speaking partner and talk more

4. Read some English magazines, newspapers, blogs...and read it loudly.

5. Write some essays and develop sentences properly without grammar mistakes will help too.