Perhaps you should try some spelling variations:
"dung hoc do snippets" » "dong hoc do snippets", "dung thuoc do snippets", "trung hoc do snippets", "dung hoc doi snippets", "dung hoc co snippets", "dung hoc bo snippets"
"dung dataea code snippets" » "dung dataea core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung dataea code snippets") or ("dung hoc do snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dataea code snippets") OR ("dung hoc do snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dataea code snippets ) or ( dung hoc do snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dataea code snippets") or ("dung hoc do snippets"))) or ("locating bug code snippets"))*.