Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung thi 23 slippers" » "dung tai 23 slippers", "dung tri 23 slippers", "dung chi 23 slippers", "dung thi 23 slippery", "dung thi 23 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 thi 23 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 thi 23 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thi 23 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thi 23 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.