Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"tran dung cam snippets" » "tran dang cam snippets", "tran hung cam snippets", "tran quang cam snippets", "tran dung lam snippets", "tran dung cac snippets", "tran dung nam snippets"
"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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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("tran dung cam snippets"))) OR ("locating bug code snippets")).
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