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