Perhaps you should try some spelling variations:
"van anh thuc snippets" » "van am thuc snippets", "van dan thuc snippets", "van anh tu snippets", "van thanh thuc snippets", "van minh thuc snippets", "tuan anh thuc snippets", "van anh thuc slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets"

Try widening your search to All Fields.

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