Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc tan con snippets" » "ngoc tuan con snippets", "ngoc toan con snippets", "ngoc lan con snippets", "ngoc tan cong snippets", "ngoc tao con snippets", "ngoc ta 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 tan 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 tan con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc tan con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc tan con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.