Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"duc toan trac slippers" » "duc toan tran slippers", "duc thoan tran slippers", "duc toan tap slippers", "duc tan trac slippers", "duc ton trac slippers", "duc hoan trac slippers", "duc toan trac slippery", "duc toan trac grippers"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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