Perhaps you should try some spelling variations:
"_ using open grippers" » "_ using opencl grippers", "_ using one grippers", "_ housing open grippers", "_ using open slippers"
"using java java slippery" » "using data java slippery", "using java java slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"_ using open grippers\") OR (\"using java java slippery\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( _ using open grippers ) OR ( using java java slippery ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ using open grippers") OR ("using java java slippery"))) OR ("locating bug code snippets"))*.