Perhaps you should try some spelling variations:
"phap hoc kinh slippery" » "phap hoan kinh slippery", "phap mo kinh slippery", "phap han kinh slippery", "phap hoc sinh slippery", "phap luoc kinh slippery", "phap hoc kinh 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: "((((\"phap hoc kinh slippery\") OR (\"python using a snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( phap hoc kinh slippery ) OR ( python using a snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("phap hoc kinh slippery") OR ("python using a snippets"))) OR ("locating bug code snippets"))*.