Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"duong dang heo snippets" » "dung dang heo snippets", "duong dan heo snippets", "duong dung heo snippets", "duong dang deo snippets", "duong tang theo snippets", "duong dang hien 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 ("duong dang heo snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("duong dang heo snippets"))) OR ("locating bug core snippets")).
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