Perhaps you should try some spelling variations:
"hap van phan slices" » "hap van ham slices", "hap van phong slices", "hap van thanh slices", "hap luan phan slices", "phap van phan slices", "nhap van phan slices", "tap van phan slices"
"python using java slippery" » "python using data slippery", "python using java slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

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 slippery\") OR (\"hap van phan slices\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using java slippery ) OR ( hap van phan slices ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java slippery") OR ("hap van phan slices"))) OR ("locating bug code snippets"))*.