To do an advanced search click the <ADVANCED SEARCH> tab at the top of the page to enter the advanced search page. You now have a range of options to help you find what you’re looking for.
At the top of the advanced search page there are some free text boxes. These are for inserting multiple keywords and to let you determine the precise rules for how those keywords will be used in the search: choosing the right rule will help you get optimal search results from your keywords.
The free text boxes are :