Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nen than vo snippets" » "nen thanh vo snippets", "den thanh vo snippets", "yen thanh vo snippets", "nen than va snippets", "nen than doc snippets", "nen than hoc 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: (((("nen than vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nen than vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nen than vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nen than vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.