Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc my doi snippets" » "duc m doi snippets", "duc mo doi snippets", "duc sy doi snippets", "duc ky doi snippets", "duc ly doi 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: (((("duc my doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc my doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc my doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc my doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.