Topic is too narrow

You will not find enough information
You will spend too much time tracking down information
Your assignment may lack depth

How can I broaden my topic?

Do not limit your topic to specific issues, such as geographical location or time period
Think of other issues related to your topic that may provide more information
Consult a subject encyclopedia to get a broader perspective on the topic

Examples

You have chosen as your topic the effects of television violence in Canadian programming on children from single parent homes in Montreal. You may be able to find one or two studies that could be relevant, but you will likely have a hard time locating useful material.

Rather than covering many aspects at the same time, try to broaden your topic by being less specific

Here are a few examples:

Exclude geographic locations such as Canadian and Montreal: The effects of television violence on children from single parent homes
Think of other relevant issues that may provide more information: Television violence in Canadian children's programming. The Role of television in single parent homes