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