Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"phan tong cot snippets" » "phan trong cot snippets", "phan cong cot snippets", "han tong cot snippets", "phan tong cong snippets", "phan tong hop snippets", "phan dong co 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 ("phan tong cot snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("phan tong cot snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( phan tong cot snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("phan tong cot snippets"))) or ("locating bug code snippets"))*.