Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung cong chat snippets" » "dung trong chat snippets", "dung cong nhat snippets", "dung cong cua snippets", "dung cong ha 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 cong chat 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 cong chat snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cong chat snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cong chat snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.