Perhaps you should try some spelling variations:
"trinh chat cong snippets" » "tinh chat cong snippets", "trinh luat cong snippets", "trinh han cong snippets", "trinh chat chong snippets", "trinh chat long snippets", "trinh chat song snippets"
"dung a data snippets" » "dung va data snippets", "dung ha data snippets", "dung ai data snippets", "dung _ data snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung a data snippets") or ("trinh chat cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung a data snippets") OR ("trinh chat cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung a data snippets ) or ( trinh chat cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung a data snippets") or ("trinh chat cong snippets"))) or ("locating bug code snippets"))*.