i found this great plugin for one of my friends and i though i would share it with everyone.
WordPress › Relevanssi WordPress Plugins
extract from the official website : Relevanssi, a better search for WordPress
Relevanssi (Finnish for “relevance”), a new WordPress search with following features:
- Relevance-sorted results, so the best results are first.
- Very simple, yet effective search engine.
- Fuzzy matching to make finding results easier.
- Easy installation.
- Updates index automatically and quickly.
- Modifying the stop word list used by the indexing is possible and simple.
- Indexing can be set to include only posts, only pages or both.
- Relevanssi can index comments, tags and custom fields.
- Relevanssi can also expand shortcodes before indexing documents.
- The plugin comes stop word lists in several languages besides English.
- Search results show the part of the document where the search term is.
- Search terms are highlighted in the results, with several different methods available.
- Search term logging.
- Search results can be limited to certain categories or tags.
- Certain categories or tags can be excluded from the search results.
I hope this can help someone..