Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"tran giang phi slippers" » "tran quang phi slippers", "tran gia phi slippers", "tran hoang phi slippers", "tran giang nhi slippers", "tran giang thi slippers", "tran gian phi slippers", "tran giang phi slippery", "tran giang 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 ("tran giang 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 ("tran giang phi slippers"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("tran giang phi slippers"))) or ("locating bug code snippets"))*.