Perhaps you should try some spelling variations:
"thong cach anh snippets" » "phong cach anh snippets", "thong cac anh snippets", "trong cach anh snippets", "thong cach nhanh snippets", "thong cach mang snippets", "thong sach danh snippets", "thong cach anh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("thong cach anh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong cach anh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("thong cach anh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.