Perhaps you should try some spelling variations:
"thong dung core snippets" » "thong cong core snippets", "thong thuong core snippets", "thong dung cong snippets", "thong dung con snippets", "thong dung coc snippets", "thong dung chore snippets", "thong dung congre snippets", "thong dung cuare snippets"
"thong dung co snippets" » "thong cong co snippets", "thong thuong co snippets", "thong dung cho snippets", "thong dung cong snippets", "thong dung cua snippets"
"locating bug code snippets" » "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: (((("thong dung core snippets") OR ("thong dung co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong dung core snippets") OR ("thong dung co snippets"))) OR ("locating bug code snippets")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"thong dung core snippets\") OR (\"thong dung co snippets\"))) or (\"locating bug code snippets\"))".
• Removing quotes may allow a broader search: (((( thong dung core snippets ) OR ( thong dung co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong dung core snippets") OR ("thong dung co snippets"))) or ("locating bug code snippets"))*.