Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"cau hoang trac snippets" » "cau hoang tran snippets", "cau hoang thach snippets", "cau hoang trang snippets", "cam hoang trac snippets", "cap hoang trac snippets", "cau hoa trac 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 ("cau hoang trac snippets"))) or ("locating bug core snippets"))~.
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