Perhaps you should try some spelling variations:
"dung tin java snippets" » "dung trinh java snippets", "dung think java snippets", "dung tin va snippets", "dong tin java snippets", "luong tin java snippets", "dung tren java snippets", "dung tin java slippers"
"python using _ snippets" » "python using _ 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: "((((\"python using _ snippets\") OR (\"dung tin java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using _ snippets ) OR ( dung tin java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using _ snippets") OR ("dung tin java snippets"))) OR ("locating bug code snippets"))*.