Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong thi hoc snippets" » "dong thi code snippets", "duong thi hoc snippets", "dang thi hoc snippets", "dong tai hoc snippets", "dong thai hoc snippets", "dong tri hoc snippets", "dong thi hoa 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: (((("dong thi hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong thi hoc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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