Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam soc cua snippets" » "nam so cua snippets", "nam moc cua snippets", "nam son cua snippets", "nam hoc cua snippets", "nam doc cua snippets", "nam goc cua 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 soc cua 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 soc cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam soc cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam soc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.