Perhaps you should try some spelling variations:
"python using java slippers" » "python using data slippers", "python using java grippers"
"n trinh thi slippery" » "n trinh tai slippery", "n dinh thi slippery", "n trinh tu slippery", "p trinh thi slippery", "anh trinh thi slippery", "dan trinh thi slippery"
"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 java slippers\") OR (\"n trinh thi slippery\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using java slippers ) OR ( n trinh thi slippery ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java slippers") OR ("n trinh thi slippery"))) OR ("locating bug code snippets"))*.