Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi dan chan snippets" » "doi dan gian snippets", "doi dan ca snippets", "doi van chat snippets", "hoi dan chan snippets", "doi ban chan snippets", "doi dau chan 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 dan chan 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 dan chan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi dan chan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi dan chan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.