Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"trinh cho tao slippers" » "trinh chao tao slippers", "trinh co tao slippers", "trinh chat tao slippers", "trinh chon tao slippers", "trinh che tao slippers", "trinh cho dao slippers", "trinh cho tao slippery", "trinh cho tao 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 cho tao 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 cho tao slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( trinh cho tao slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("trinh cho tao slippers"))) or ("locating bug code snippets"))*.