Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung hon vo snippets" » "dung hong vo snippets", "dung hoc vo snippets", "dung con vo snippets", "dung hon so snippets", "dung hon bo snippets", "dung hon va 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 hon vo 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 hon vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hon vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hon vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.