Perhaps you should try some spelling variations:
"trong thuc cach snippets" » "trong thuc code snippets", "trong thu cach snippets", "thuong thuc cach snippets", "trong thuat cach snippets", "trong thuoc sach snippets", "trong truoc cach snippets", "trong thuc hanh snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("trong thuc cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong thuc cach snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trong thuc cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.