Perhaps you should try some spelling variations:
"dung nhat chao snippets" » "dung nhat code snippets", "dung nhan chao snippets", "dang nhat chao snippets", "dung nha chao snippets", "dung nhat cho snippets", "dung nhat cua snippets", "dung chat 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 chao 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 chao snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung nhat chao snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung nhat chao snippets"))) or ("locating bug core snippets"))*.