Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung nang o2 snippets" » "dung nang code snippets", "dun nang o2 snippets", "dung dang o2 snippets", "dung quang o2 snippets", "dung hang o2 snippets", "dung nang doc snippets", "dung 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: (((("dung nang o2 snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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