Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dao hoc duoc snippets" » "dao hoc nuoc snippets", "dao hoa duoc snippets", "dao hoc dung snippets", "dai hoc duoc snippets", "dan hoc duoc snippets", "day hoc duoc snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dao hoc duoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao hoc duoc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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