Using the extended search you can link search criteria together in order to refine the search. Tip: If you are already within a rubric you can restrict the search to this rubric.Using the full-text search you can link several search terms by using "and" or "or". The "and" search will deliver articles containing both search terms. The "or" search will deliver articles containing either one or both of the search terms used.If you do not know the exact search term, you can use the star(*). For example: oak processionary*. In this case the system will deliver all articles on the subject of the oak processionary moth.