Perhaps you should try some spelling variations:
"thi trinh o2 snippets" » "tho trinh o2 snippets", "thi thanh o2 snippets", "thi minh o2 snippets", "thi trinh o snippets", "thi trinh hoa snippets", "thi trinh hoi snippets"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets"
"locating bug code snippets" » "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: (((("thi trinh o2 snippets") or ("python using sat snippets"))) or ("locating bug code snippets"))~.
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