Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pha hoc dan slippers" » "phap hoc dan slippers", "phau hoc dan slippers", "nha hoc dan slippers", "pha hoc dan slippery", "pha hoc dan grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

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