Perhaps you should try some spelling variations:
"python using java grippers" » "python using data grippers", "python using java slippers"
"php cac dan slippery" » "phap cac dan slippery", "pha cac dan slippery", "phap cach dan slippery", "php cac dan 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: "((((\"php cac dan slippery\") OR (\"python using java grippers\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( php cac dan slippery ) OR ( python using java grippers ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("php cac dan slippery") OR ("python using java grippers"))) OR ("locating bug code snippets"))*.