Perhaps you should try some spelling variations:
"dung toan do snippets" » "dung doanh do snippets", "dung thang do snippets", "dung thanh do snippets", "dung toan ho snippets", "dung toan co snippets", "dung toan du 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 toan do 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 toan do snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh do code snippets ) or ( dung toan do snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh do code snippets") or ("dung toan do snippets"))) or ("locating bug code snippets"))*.