Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"biet nam dan snippets" » "viet nam dan snippets", "biet nhat dan snippets", "viet nami dan snippets", "biet nam dinh snippets", "biet nam 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: (((("biet nam 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: (((("biet nam dan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( biet nam dan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("biet nam dan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.