Searching on this site uses Search++, a highly enhanced search system for concrete5.
For example, the core search would find "Magic Tabs", but would return no results for any of:
Search++ handles full phrases and individual words, stemming, synonyms, abbreviations and acronyms, building a ranked search to list the best matches.
We also have a page showing a more direct comparison at Search Comparison.
If you would like to add similar enhanced searching to your concrete5 site, please contact me and we can discuss your search requirements.