Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"cuoc sach phat snippets" » "cuoc cach phat snippets", "cuon sach phat snippets", "nuoc sach phat snippets", "cuoc sach nha snippets", "cuoc sach tham snippets", "cuoc cach pha snippets", "cuoc sach phat slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("cuoc sach phat snippets") or ("dung java java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuoc sach phat snippets") OR ("dung java java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( cuoc sach phat snippets ) or ( dung java java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuoc sach phat snippets") or ("dung java java snippets"))) or ("locating bugs code snippets"))*.