Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung ung cong snippets" » "dung trung cong snippets", "dung quang cong snippets", "dung chung cong snippets", "dung dung cong snippets", "dung luong cong snippets", "dung duong cong 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 ung 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 ung cong snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung ung cong snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung ung cong snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.