Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"nam qua dan snippets" » "nam quan dan snippets", "nam cua dan snippets", "nam mua dan snippets", "nam qua danh snippets", "nam qua ban snippets", "nam qua dan slippers"
"locating bug code snippets" » "locating bug code slippers", "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 qua dan 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 qua dan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam qua dan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam qua dan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.