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