what are the ways to get traffic from google to my "search engine portal website" with low CPC( not >0.03) your experiences, views and suggestions are most welcome.
Best thing you can do is to just try - pull up a huge list of keywords and bid lower than 3 cents. You'll probably get most of your traffic from the content network. But really, I would advise against this kind of thing. You're basicaly sending visitors from one search engine to the next, which doesn't really help them find what they're looking for. Google would consider this a poor user experience and will probably raise your minimum bids limiting your ability to actually pull this off.
I agree with T_Media. Another alternative would be to set a schedule to your campaign and let it run on off-peak times either on Google or the Content Network. The price bid will depend on how picky you are with the keywords or phrases you choose.