Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong duc con snippets" » "duong duc con snippets", "dong duoc con snippets", "dong luc con snippets", "dong duc cong snippets", "dong duc ton snippets", "dong duc cuong 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: (((("dong duc con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong duc con snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong duc con snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong duc con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.