Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tan tran doi snippets" » "tan tran code snippets", "tan truan doi snippets", "tan trao doi snippets", "tan tren doi snippets", "toan tran doi snippets", "than tran doi snippets", "tuan tran doi 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: (((("tan tran doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan tran doi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tan tran doi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan tran doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.