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