Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung thi 05 slippers" » "dung tai 05 slippers", "dung tri 05 slippers", "dung chi 05 slippers", "dung thi 05 slippery", "dung thi 05 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 05 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 05 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thi 05 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thi 05 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.