Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"tran tuan den snippets" » "tran xuan den snippets", "tran quang den snippets", "tran thanh den snippets", "tran quan den snippets", "tran luan den snippets", "tran quan dien snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") or ("tran tuan den snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("tran tuan den snippets"))) OR ("locating bug code snippets")).
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