Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quan song du snippets" » "qua song du snippets", "quan dong du snippets", "quan long du snippets", "quan song da snippets", "quan mong du snippets", "quan song ngu 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: (((("quan song du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quan song du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quan song du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quan song du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.