Perhaps you should try some spelling variations:
"tran hoc trinh snippets" » "tran doc trinh snippets", "tran hoc tinh snippets", "tran hoc sinh snippets", "toan hoc trinh snippets", "than hoc trinh snippets", "trac hoc trinh snippets", "tran hoc trinh 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: (((("tran hoc trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran hoc trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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