Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong co toc snippets" » "dong co toc snippets", "cong cu toc snippets", "cong so toc snippets", "cong cao toc snippets", "cong co hoc snippets", "cong co doc 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: (((("cong co 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: (((("cong co toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong co toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong co toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.