Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"yun wang hye snippets" » "yu wang hye snippets", "yun pang hye snippets", "ying wang hye snippets", "yun hwang hye snippets", "yun yang hye snippets", "yun bang 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: (((("dung java java snippets") or ("yun wang hye snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("yun wang hye snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( yun wang hye snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("yun wang hye snippets"))) or ("locating bug code snippets"))*.