Perhaps you should try some spelling variations:
"thong tin code snippets" » "thong tin co snippets", "trong tin code snippets", "thong tin code slippers"
"dung hoc code snippets" » "dong hoc code snippets", "dung thuoc code snippets", "trung hoc code snippets", "dung hoc co snippets", "dung hoc cong snippets", "dung hoc de snippets", "dung hoc 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: (((("thong tin code snippets") or ("dung hoc code snippets"))) or ("locating bug code snippets"))~.
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