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