Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi ngu co snippets" » "doi nhu co snippets", "noi ngu co snippets", "doi nguoi co snippets", "doi ngu ca snippets", "doi ngu c snippets", "doi ngu so 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: (((("doi ngu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi ngu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi ngu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi ngu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.