Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"gap doi hoan snippets" » "gap doi hoa snippets", "gap doi hoac snippets", "gap doi hoat snippets", "lap doi hoan snippets", "gap do hoan snippets", "gap phoi hoan 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: (((("gap doi hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
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