The text search engine allows queries to be formed from arbitrary Boolean expressions containing the keywords AND, OR- For example:
You write: red orange
finds documents containing the words 'red orange' in sequence
You write: red AND orange
finds documents that contain both the words 'red' AND 'orange'.
You write: red OR orange
finds documents containing either the word 'red' OR the word 'orange'
You write the first part of a word: grow*
finds documents containing words starting with 'grow' . i.e.: growing, grows, growth