Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"luan nang o2 snippets" » "luan nang code snippets", "luan van o2 snippets", "van nang o2 snippets", "luan san o2 snippets", "luan hang o2 snippets", "luan nang doc snippets", "luan nang hoc snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("luan nang o2 snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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