Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa dan xac slippers" » "khoa dang xac slippers", "hoa dan xac slippers", "khoa can xac slippers", "khoa dan bac slippers", "khoa dan cac slippers", "khoa dan xa slippers", "khoa dan xac slippery", "khoa dan xac grippers"
"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: (((("khoa dan xac slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa dan xac slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("khoa dan xac slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.