Perhaps you should try some spelling variations:
"python using java slippers" » "python using data slippers", "python using java slippery"
"cac van vinh grippers" » "cac van minh grippers", "cac van dinh grippers", "cac van binh grippers", "cac dan vinh 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java slippers") or ("cac van vinh grippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java slippers") OR ("cac van vinh grippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java slippers ) or ( cac van vinh grippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java slippers") or ("cac van vinh grippers"))) or ("locating bug code snippets"))*.