Perhaps you should try some spelling variations:
"pha hoc dinh slippery" » "pha hoc sinh slippery", "pha hoc kinh slippery", "pha hoc danh slippery", "phap hoc dinh slippery", "phau hoc dinh slippery", "nha hoc dinh slippery", "pha hoc dinh 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.

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