Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"van tan trac snippets" » "van toan trac snippets", "van tan tran snippets", "van tap trac snippets", "van tuan trac snippets", "van ban trac snippets", "van tai trac snippets"

Try widening your search to All Fields.

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