Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung tren 10 slippers" » "dung trong 10 slippers", "dung trung 10 slippers", "dung tren 10 slippery", "dung tren 10 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: (((("dung tren 10 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tren 10 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tren 10 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tren 10 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.