Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"doan nam de snippets" » "dan nam de snippets", "hoang nam de snippets", "doan va de snippets", "doan nam da snippets", "doan nam do snippets", "doan nam he 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: (((("doan nam de snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan nam de snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan nam de snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan nam de snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.