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