Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"tan trinh kiem snippets" » "tan trinh kinh snippets", "tan trinh dien snippets", "tan trinh ke snippets", "tan thinh kiem snippets", "tao trinh kiem snippets", "dan trinh kiem snippets"
"locating bug core snippets" » "locating bug 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 ("tan trinh kiem snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("tan trinh kiem snippets"))) OR ("locating bug core snippets")).
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