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