Perhaps you should try some spelling variations:
"dung doanh co snippets" » "dung dan co snippets", "dung dong co snippets", "dung doanh cua snippets", "dung doanh va snippets", "dung anh co snippets"
"dong rate code snippets" » "dong vat code snippets", "dong dat code snippets", "dong rate core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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: (((("dong rate code snippets") or ("dung doanh co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong rate code snippets") OR ("dung doanh co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong rate code snippets ) or ( dung doanh co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong rate code snippets") or ("dung doanh co snippets"))) or ("locating bug code snippets"))*.