Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"duc van dat snippets" » "duc va dat snippets", "duc tan dat snippets", "duc manh dat snippets", "duc van dao snippets", "duc van dau snippets", "duc dan dat snippets", "duc van dat 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: "((((\"duc van dat snippets\") OR (\"python using java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( duc van dat snippets ) OR ( python using java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("duc van dat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets"))*.