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