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