Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"luc chat hoc snippets" » "luc chat code snippets", "luc nhat hoc snippets", "luu chat hoc snippets", "muc chat hoc snippets", "luc chat hoa snippets", "luc chat thom snippets", "luc cho hoc 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: (((("luc chat 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: (((("luc chat hoc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luc chat hoc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc chat hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.