Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung dang cong snippets" » "dung dan cong snippets", "dung dong cong snippets", "dung danh cong snippets", "dung dung cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung dang cong snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dang cong snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dang cong snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dang cong snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.