Perhaps you should try some spelling variations:
"trinh cac trong snippets" » "trinh cau trong snippets", "trinh chat trong snippets", "trinh chao trong snippets", "trinh cac truong snippets", "trinh cay trong snippets", "trinh tac trong snippets", "trinh cac trong slippers"
"dung ung code snippets" » "dung trung code snippets", "dung quang code snippets", "dung chung code snippets", "dung ung co snippets", "dung ung code 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 cac trong snippets") or ("dung ung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cac trong snippets") OR ("dung ung code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh cac trong snippets") or ("dung ung code snippets"))) or ("locating bug code snippets"))*.