Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"trinh tam phi slippers" » "trinh tai phi slippers", "trinh toan phi slippers", "trinh cham phi slippers", "trinh nam phi slippers", "trinh tam thi slippers", "trinh tac phi slippers", "trinh tam phi slippery", "trinh tam phi 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 ("trinh tam phi slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("trinh tam phi slippers"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("trinh tam phi slippers"))) or ("locating bug code snippets"))*.