Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam len cong snippets" » "nam den cong snippets", "nam le cong snippets", "nam len con snippets", "nam men cong snippets", "dam len cong snippets", "nam hien 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: (((("nam len 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: (((("nam len cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam len cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam len cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.