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