Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"tran mach toc snippets" » "tran manh toc snippets", "trinh mach toc snippets", "trong mach toc snippets", "tran mach hoc snippets", "tran mach tich snippets", "tran bach tuoc 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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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") or ("tran mach toc snippets"))) or ("locating bug code snippets"))~.
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