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