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