Perhaps you should try some spelling variations:
"using rate code snippets" » "using waste code snippets", "using data code snippets", "using raw code snippets", "using rate core snippets"
"dung cac cuoc snippets" » "luong cac cuoc snippets", "dung cho cuoc snippets", "dung tai cuoc snippets", "dung cac nuoc snippets", "dung ca cuoc snippets", "dung cac quoc snippets"
"locating bug code snippets" » "locating bug core snippets", "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: (((("using rate code snippets") or ("dung cac cuoc snippets"))) or ("locating bug code snippets"))~.
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