Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc dua voi snippets" » "duc duat voi snippets", "duc duy voi snippets", "duc dung voi snippets", "duc da voi snippets", "duc dua moi snippets", "duc sua voi 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 dua 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 dua voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc dua voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc dua voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.