Perhaps you should try some spelling variations:
"dung quoc cong snippets" » "dang quoc cong snippets", "dong quoc cong snippets", "trung quoc cong snippets", "dung quoc cuong snippets", "dung nuoc cong snippets", "dung luoc cong snippets"
"dung java java snippets" » "dung va java 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 quoc 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: (((("dung quoc cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung quoc cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung quoc cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.