Perhaps you should try some spelling variations:
"dung dung cua snippets" » "duong dung cua snippets", "ung dung cua snippets", "dung ung cua snippets", "dung dung luan snippets", "dung dung cho snippets"
"trinh do code snippets" » "trinh ky code snippets", "trinh do 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: (((("trinh do code snippets") or ("dung dung cua snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh do code snippets") OR ("dung dung cua snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh do code snippets ) or ( dung dung cua snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh do code snippets") or ("dung dung cua snippets"))) or ("locating bug code snippets"))*.