Perhaps you should try some spelling variations:
"dung thi cung snippets" » "dung thi code snippets", "dung tai cung snippets", "dung tri cung snippets", "dung chi cung snippets", "dung thi cuong snippets", "dung thi chung snippets", "dung thi cong 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 thi cung 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 thi cung snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung thi cung snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thi cung snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.