The full text search

A few explanations on full text search:

• Search terms can be entered into the text field.
• With the radio buttons below you decide on the connection of the search terms:
1. And connection: all search terms have to exist in the text.
2. Or connection: at least one of the search terms have to exist in the text.
3. Professional search: This button allows a search with an extended syntax:
   AND
   OR
   Parentheses
   Thus, it is possible to perform complex searches, e.g. study AND (cannabis OR thc).
   Please note: The key words AND and OR have to be capitalized.
• Besides, it is possible to select whether the use of small/capital letters has to be observed.
• Additionally, it is possible to restrict the search on single themes by activating the corresponding check boxes.