Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"tran tuan duoc snippets" » "tran xuan duoc snippets", "tran quang duoc snippets", "tran thanh duoc snippets", "tran tan duoc snippets", "tran tuan duong snippets", "tran thuat duoc 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 ("tran tuan duoc snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("tran tuan duoc snippets"))) OR ("locating bug core snippets")).
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