Perhaps you should try some spelling variations:
"trinh chat code snippets" » "tinh chat code snippets", "trinh luat code snippets", "trinh han code snippets", "trinh chat co snippets", "trinh chat cong snippets", "trinh chat code slippers"
"dung cua tuc snippets" » "dung luan tuc snippets", "dung cho tuc snippets", "dung cua duc snippets", "dung cua tu snippets", "dung cua thuoc snippets", "dung cua tuc slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh chat code snippets") or ("dung cua tuc snippets"))) or ("locating bug code snippets"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("trinh chat code snippets") or ("dung cua tuc snippets"))) or ("locating bug code snippets"))*.