Perhaps you should try some spelling variations:
"python using open snippets" » "python using opencl snippets", "python using one snippets"
"tri noi dat snippets" » "tri doi dat snippets", "tri moi dat snippets", "tri ngoai dat snippets", "tri hoi dat snippets", "tri noi bat snippets", "tri noi da snippets"
"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 open snippets\") OR (\"tri noi dat snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using open snippets ) OR ( tri noi dat snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using open snippets") OR ("tri noi dat snippets"))) OR ("locating bug code snippets"))*.