Perhaps you should try some spelling variations:
"dung chon dat snippets" » "dung cho dat snippets", "dung con dat snippets", "dung hon dat snippets", "dung chinh dat snippets", "dung cho dao snippets", "dung chon dat slippers"
"trinh do code snippets" » "trinh ky code snippets", "trinh do core snippets", "trinh do code slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "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 chon dat 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 chon dat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh do code snippets ) or ( dung chon dat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh do code snippets") or ("dung chon dat snippets"))) or ("locating bug code snippets"))*.