Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc dung voi snippets" » "duc hung voi snippets", "duc cuong voi snippets", "duc phung voi snippets", "duc dung von snippets", "duc dung doi snippets", "duc dung vi 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: (((("duc dung voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc dung voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc dung voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc dung voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.