Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung cua cat snippets" » "dung luan cat snippets", "dung cho cat snippets", "dung cua cac snippets", "dung cua vat snippets", "dung cua cay 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 cua cat 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 cua cat snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cua cat snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cua cat snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.