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