Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi van don snippets" » "do van don snippets", "doi va don snippets", "doi ban don snippets", "doi van dong snippets", "doi van doan snippets", "doi van dan 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 van don 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 van don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi van don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi van don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.