Perhaps you should try some spelling variations:
"dung trang ke snippets" » "dung trong ke snippets", "dung trung ke snippets", "dung thang ke snippets", "dung trang de snippets", "dung trang kien snippets", "dung trang web snippets"
"dung java java snippets" » "dung va java 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 trang ke snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung trang ke snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung trang ke snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung trang ke snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.