Different databases treat truncation and wildcard symbols in different ways. To check what symbols you should use in a particular database, check the help pages. Open the document below for some common examples of truncation and wildcard symbols.
Economics by Mark Wainwright - flickr
To find articles on a topic, you can search databases subscribed to by the library. Start by searching a full-text database where about 50% or more of the journal and newspaper articles are online.
The articles you find will be mainly from international sources and you should construct your search in a particular way. You must use the Boolean terms and and or between your search terms. For example:
You can also limit your search to articles within a Date range e.g. on or after the 1st June 2009. Here are some relevant full-text databases: