Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc vuon toi snippets" » "duc vuong toi snippets", "duc cuong toi snippets", "duc huong toi snippets", "duc vuong thi snippets", "duc vuot troi 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 vuon toi 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 vuon toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc vuon toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc vuon toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.