Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"dung tinh ky snippets" » "dang tinh ky snippets", "dung ninh ky snippets", "dung tin ky snippets", "dung trinh ky snippets", "dung kinh ky snippets", "dung minh ky snippets"
"locating bug code 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 core snippets") or ("dung tinh ky snippets"))) or ("locating bug code snippets"))~.
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