Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trinh thi can snippets" » "trinh tai can snippets", "trinh thiet can snippets", "trinh tu can snippets", "trinh thi canh snippets", "trinh thi lan snippets", "trinh thi dan 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 ("trinh thi can snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trinh thi can snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trinh thi can snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trinh thi can snippets"))) or ("locating bug code snippets"))*.