Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"python using java snippets" » "python using data snippets", "python using java slippers"
"duc toan 2 snippets" » "duc tan 2 snippets", "duc ton 2 snippets", "duc hoan 2 snippets", "duc toan _ snippets", "duc toan 4 snippets", "duc toan o snippets", "duc toan 2 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: "((((\"duc toan 2 snippets\") OR (\"python using java snippets\"))) OR (\"locating bugs code snippets\"))~".
• Removing quotes may allow a broader search: (((( duc toan 2 snippets ) OR ( python using java snippets ))) OR ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("duc toan 2 snippets") OR ("python using java snippets"))) OR ("locating bugs code snippets"))*.