Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"hoi hoc trac snippets" » "hoi hoi trac snippets", "hoi hoc truc snippets", "hoi hoc thuc snippets", "hoa hoc trac snippets", "khoa hoc trac snippets", "hoi chuc trac snippets"

Try widening your search to All Fields.

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