Perhaps you should try some spelling variations:
"cho doi chieu snippets" » "cho doc hieu snippets", "cho doi chi snippets", "cho ho chieu snippets", "cho moi chieu snippets", "cuoc doi chieu snippets", "cho tuoi chieu snippets"
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low 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: (((("cho doi chieu snippets") or ("python using raw snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho doi chieu snippets") OR ("python using raw snippets"))) OR ("locating bug code snippets")).
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