Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"dat quan trinh snippets" » "dat qua trinh snippets", "dat quan tinh snippets", "dat xuan trinh snippets", "dat quang trinh snippets", "dan quan trinh snippets", "dat luan trinh snippets", "dat quan trinh slippers"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"

Try widening your search to All Fields.

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