search database using keyword

Can someone teach me the code to search inside the database using a keyword.Fow example,i have a book store and i want to know the books that are related to Delphi.
On the program when i insert the keyword Delphi into the edsearch,the DBGrid display the books that are related to the word Delphi like Mastering Delphi 6,Internet Application With Delphi 6,or any title else without considering the position of the string Delphi.Is it in front,middle or perhaps in the last.Thx guys...