Perhaps you should try some spelling variations:
"dung trinh java snippets" » "dung tinh java snippets", "dong trinh java snippets", "cong trinh java snippets"
"using lc core snippets" » "using c core snippets", "using l core snippets", "using low core 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: "((((\"using lc core snippets\") OR (\"dung trinh java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using lc core snippets ) OR ( dung trinh java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using lc core snippets") OR ("dung trinh java snippets"))) OR ("locating bug code snippets"))*.