When searching a large periodical database, like ProQuest or Academic Search Premier, your goal is to get a reasonable number (around 50) of highly relevant articles. To do this, use the Advanced Search feature to combine keywords specific to your topic. Be sure to combine words that make sense. For xample:
ecotourism AND China [or another country]
tourism AND sustainability
green travel AND wildlife
Use other features in the databases to focus your searches:
• If you search on the name of a country or place, change the drop-down on the right to "Location" or "Geographic Name"
• Check the box that will limit your results to full-text articles only
• Define a date range (for example: 2005 to 2012)
• Use their "Suggested Topics" or "Find More Like This" feature
Here's an example of an Advanced Search in ProQuest:
