Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc hang hoa snippets" » "hoc hang hoa snippets", "oc hang hoa snippets", "toc mang hoa snippets", "toc hang khoa snippets", "toc thanh hoa snippets", "toc hang va 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 hang hoa 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 hang hoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc hang hoa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc hang hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.