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