Perhaps you should try some spelling variations:
"dang tinh java snippets" » "dang dinh java snippets", "dang sinh java snippets", "dang vinh java snippets", "dang trinh java snippets", "dang think java snippets", "dang tinh va snippets"
"using c core snippets" » "using lc core snippets", "using a core snippets", "using _ 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using c core snippets") OR ("dang tinh java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using c core snippets ) or ( dang tinh java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using c core snippets") or ("dang tinh java snippets"))) or ("locating bug code snippets"))*.