You would be required to know little bit of “ Boolean Operators ” to issue a multi-worded Query AND means All Words Should be There OR means ANY of the Words Should be There NOT means the Word After NOT Should Not be There NOTE
From the result page you may even refine you query. For example I want “Malaria” to be retrieved in context to Delhi”. So I have added “AND delhi”. I have to click on Begin New Search to execute this search.
Observer various search option. Let us try advanced search.
You might have noticed that our previous queries were not giving very precise results. It was retrieving references having keywords anywhere in the reference. For example, Delhi was coming from Address of the author in some references. The article itself had nothing to do with “malaria in delhi” In Advanced Search, We can qualify the search keywords.