Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"tran lam robot slippers" » "tran tao robot slippers", "tran a robot slippers", "tran tay robot slippers", "trang lam robot slippers", "tranh lam robot slippers", "trai lam robot slippers", "tran lam robot slippery", "tran lam robot 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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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") or ("tran lam robot slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("tran lam robot slippers"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("tran lam robot slippers"))) or ("locating bug code snippets"))*.