Perhaps you should try some spelling variations:
"dung cong co snippets" » "dung trong co snippets", "dung dong co snippets", "dung cong cu snippets", "dung cong so snippets"
"doanh va code snippets" » "doan va code snippets", "doanh tai code snippets", "doanh cua code snippets", "doanh va 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: (((("doanh va code snippets") or ("dung cong co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doanh va code snippets") OR ("dung cong co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doanh va code snippets ) or ( dung cong co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doanh va code snippets") or ("dung cong co snippets"))) or ("locating bug code snippets"))*.