Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong su toc snippets" » "dang su toc snippets", "dong tu toc snippets", "dong luc toc snippets", "dong so toc snippets", "dong su hoc snippets", "dong su toa snippets"
"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: (((("dong su toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong su toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong su toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong su toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.