You can do it in two ways-
1. Usng full text search
Refere these links to understand full text search
Full-Text Search[
^]
Understanding Full-Text Indexing in SQL Server[
^]
2. Using multiple conditions in WHERE clause
You may build query like -
SELECT ISBN, keywords, author_name, title
FROM YourTable
WHERE ISBN LIKE '%'+@TextToSearch+'%' OR keywords LIKE '%'+@TextToSearch+'%' OR author_name LIKE '%'+@TextToSearch+'%' OR title LIKE '%'+@TextToSearch+'%'
I would recommend to use full text search.
Hope, it helps :)