Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc son con snippets" » "ngoc hoa con snippets", "ngoc lan con snippets", "ngoc song con snippets", "ngoc son cong snippets", "ngoc lon con 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: (((("ngoc son con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngoc son con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc son con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc son con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.