Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trinh tan ca snippets" » "trinh tan code snippets", "trinh toan ca snippets", "trinh han ca snippets", "trinh van ca snippets", "trinh tan cua snippets", "trinh tang ca snippets", "trinh dan ca 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: (((("trinh tan ca snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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