Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tre van chi snippets" » "te van chi snippets", "tre can chi snippets", "tre dan chi snippets", "tre van chien snippets", "tre luan chi snippets", "tre van chat 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 van chi 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 van chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tre van chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tre van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.