Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"phi hoc luan snippets" » "phi hoc quan snippets", "phi nuoc luan snippets", "phi hoc luong snippets", "phoi hoc luan snippets", "khi hoc luan snippets", "pho hoc luan snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("phi hoc luan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi hoc luan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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