Perhaps you should try some spelling variations:
"dung nhat cheo snippets" » "dung nhat code snippets", "dung nhan cheo snippets", "dang nhat cheo snippets", "dung nha cheo snippets", "dung hat cheo snippets", "dung nham cheo snippets", "dung nhat cho snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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 java java snippets") or ("dung nhat cheo snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung nhat cheo snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung nhat cheo snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung nhat cheo snippets"))) or ("locating bug core snippets"))*.