Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung may 30 slippers" » "dung va 30 slippers", "dung tai 30 slippers", "mang may 30 slippers", "dung may 30 slippery", "dung may 30 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 may 30 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 may 30 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung may 30 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung may 30 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.