Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets", "using java code slippers"
"duong van tren snippets" » "duong va tren snippets", "luong va tren snippets", "dang van tren snippets", "duong van tien snippets", "duong quan tren snippets", "duong van trung snippets", "duong van tren slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "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 ("duong van tren snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("duong van tren snippets"))) OR ("locating bug code snippets")).
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