Perhaps you should try some spelling variations:
"van dang duc slippery" » "van dong duc slippery", "van dung duc slippery", "van nang duc slippery", "van dang quoc slippery", "van dao duc slippery", "van dang su slippery", "van dang duc slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using a snippets") or ("van dang duc slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("van dang duc slippery"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( van dang duc slippery ))) or ( locating bug code snippets ))*.