Perhaps you should try some spelling variations:
"tong quan code snippets" » "thong quan code snippets", "tong luan code snippets", "luong quan code snippets", "tong quan che snippets", "tong quan co snippets", "tong quan code slippers"
"trong cac code snippets" » "trong cac cong snippets", "trong cac co snippets", "trong cac che snippets", "trong cac code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs 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: "((((\"tong quan code snippets\") OR (\"trong cac code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( tong quan code snippets ) OR ( trong cac code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("tong quan code snippets") OR ("trong cac code snippets"))) OR ("locating bug code snippets"))*.