Perhaps you should try some spelling variations:
"dung trong code snippets" » "dung trong cong snippets", "dung trong co snippets", "dung trong che snippets"
"trinh cac mon snippets" » "trinh cau mon snippets", "trinh chat mon snippets", "trinh chao mon snippets", "trinh cac cong snippets"
"locating bug code snippets" » "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: "((((\"trinh cac mon snippets\") OR (\"dung trong code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh cac mon snippets ) OR ( dung trong code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh cac mon snippets") OR ("dung trong code snippets"))) OR ("locating bug code snippets"))*.