Perhaps you should try some spelling variations:
"python using raw slippery" » "python using real slippery", "python using a slippery", "python using low slippery", "python using raw slippers"
"tham du _ snippets" » "thap du _ snippets", "tham do _ snippets", "pham duc _ snippets"
"locating bug code snippets" » "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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using raw slippery\") OR (\"tham du _ snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using raw slippery ) OR ( tham du _ snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using raw slippery") OR ("tham du _ snippets"))) OR ("locating bug code snippets"))*.