Perhaps you should try some spelling variations:
"hoang dung con snippets" » "hoang tung con snippets", "hoang vuong con snippets", "quang dung con snippets", "hoang dung cong snippets", "hoang dung von snippets", "hoang dung co snippets"
"thong dung con snippets" » "thong cong con snippets", "thong thuong con snippets", "thong dung cong snippets", "thong dung von snippets", "thong dung co snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("hoang dung con snippets") OR ("thong dung con snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoang dung con snippets") OR ("thong dung con snippets"))) OR ("locating bug code snippets")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"hoang dung con snippets\") OR (\"thong dung con snippets\"))) or (\"locating bug code snippets\"))".
• Removing quotes may allow a broader search: (((( hoang dung con snippets ) OR ( thong dung con snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoang dung con snippets") OR ("thong dung con snippets"))) or ("locating bug code snippets"))*.