Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"tang dan cho snippets" » "tang van cho snippets", "tung dan cho snippets", "tang luan cho snippets", "tang danh cho snippets", "tang san cho snippets", "tang dac cho 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: (((("tang dan cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tang dan cho snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang dan cho snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang dan cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.