Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"web da trac slippers" » "web va trac slippers", "web da tac slippers", "web tap trac slippers", "web da trac grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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: "((((\"python using java slippery\") OR (\"web da trac slippers\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using java slippery ) OR ( web da trac slippers ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java slippery") OR ("web da trac slippers"))) OR ("locating bug code snippets"))*.