same problem from stackoverflow is :
How to search in Eclipse through project for some word ? When I start CTRL-h I need to choose field, method or …., but I need to find all occurences in project no metter method, field or .. ! How to achieve that ?
Answer is :
CTRL + H -> File Search -> Containing Text ‘some word’
make sure the scope is set to workspace or enclosing projects. Choosing Selected Resources will narrow the result set to the folder or file you selected in the explorer.
Further if you know the file type that might contain the text you can use the
File Name patterns with values like
*.php, *.phtml, *.html