Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc hoc dan slippers" » "duoc hoc dan slippers", "toc hoc dan slippers", "duc hoc dan slippers", "doc hoc dan slippery", "doc 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: (((("doc 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: (((("doc hoc dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc hoc dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc hoc dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.