Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuong van do snippets" » "duong van do snippets", "luong van do snippets", "xuong san do snippets", "xuong van dao snippets", "xuong van de snippets", "xuong van du 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: (((("xuong van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuong van do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuong van do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuong van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.