Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"nong thon cad snippets" » "nong thong cad snippets", "nong thong cac snippets", "nong thong cap snippets", "cong thon cad snippets", "dong thon cad snippets", "nang thon cad 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: (((("nong thon cad snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nong thon cad snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nong thon cad snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nong thon cad snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.