You can also reverse engineer competitors that are killing it in your niche. Just check out what keywords they're using in their title tags and header tags. Should open a few doors for you.
Thank you for your reply @stackcash. Although, the links you provided were very helpful. It's not quite what I was looking for. I don't have specific keywords yet to input on the Google Adwords Tool.
I was hoping to get the keywords from the search trends happening in the specific region of the area thus can formulate what type of service I can provide.
I guess I could do it manually by thinking of broad keywords and export the data in an excel file and compare from there. But, I might miss out on a opportunity if I couldn't think of the keyword/niche.
In google trends you can expand it from country to region by clicking on the country, and then from region to city again by clicking if their is enough data available.
I found google trend works well if you browse the categories and countries. Find terms that are high increase in search and afterward go read why it is trending like that. I found a nice trending market 2 weeks ago like that.
You research further trough Adwords keyword planner for related terms