How to make radio reception better with antenna 133 cm long
For FM radio reception getting the antenna higher off the ground is one of the best options.  Unlike AM radio FM signals are more line of sight dependent.  So if you are in an area that is generally low, such as a valley, or surrounded by hills, your reception may be poor for some or all stations.

Ideally try buying a simple low cost FM antenna, see amazon for starters:
http://www.amazon.com/Stellar-Labs-30-2435-Outdoor-Omnidirectional/dp/B00DHHOZBI/ref=sr_1_5/175-5135060-7871912?s=aht&amp;ie=UTF8&amp;qid=1446522891&amp;sr=1-5

Here are a few links to help make your own wire antenna:

http://siber-sonic.com/FM_reception/rooftop.html

http://www.robertsewell.ca/yahoo/fmaerial.html