Perhaps you should try some spelling variations:
"dang hoai cong snippets" » "dang hai cong snippets", "dang loai cong snippets", "dung hoai cong snippets", "dang hoa cong snippets", "dang hoai duong snippets", "dang hoang cong 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: (((("dang hoai cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang hoai cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang hoai cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang hoai cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.