Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"nong thon cac snippets" » "nong thong cac snippets", "nong tho cac snippets", "nong chon cac snippets", "cong thon cac snippets", "dong thon cac snippets", "nang thon cac 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 cac 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 cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nong thon cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nong thon cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.