Perhaps you should try some spelling variations:
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets"
"thi dan code snippets" » "thi dan de snippets", "thi doan code snippets", "thi lan code snippets", "thi dai code snippets"
"locating bug core snippets" » "locating bug code 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: "((((\"thi dan code snippets\") OR (\"python using raw snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( thi dan code snippets ) OR ( python using raw snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("thi dan code snippets") OR ("python using raw snippets"))) OR ("locating bug core snippets"))*.