Perhaps you should try some spelling variations:
"nhung tri tinh snippets" » "nhung bai tinh snippets", "nhung bi tinh snippets", "nhung gi tinh snippets", "nhung tri kinh snippets", "nhung trieu tinh snippets", "nhung thai tinh snippets", "nhung tri tinh slippers"
"using a code snippets" » "using a core snippets", "using a code slippers"
"locating bug code snippets" » "locating bug core 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: (((("using a code snippets") or ("nhung tri tinh snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("nhung tri tinh snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("nhung tri tinh snippets"))) or ("locating bug code snippets"))*.