Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tre can toan snippets" » "tre van toan snippets", "tre dan toan snippets", "tre manh toan snippets", "tiep can toan snippets", "tiem can toan 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: (((("tre can toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tre can toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tre can toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tre can toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.