Perhaps you should try some spelling variations:
"va dung lam slippery" » "va dung luan slippery", "va dung tai slippery", "va dung dat slippery", "van dung lam slippery", "va duong lam slippery", "vat dung lam slippery", "va dung lam 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: (((("va dung lam slippery") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va dung lam slippery") OR ("python using a snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( va dung lam slippery ) or ( python using a snippets ))) or ( locating bug code snippets ))*.