Perhaps you should try some spelling variations:
"using lc code snippets" » "using c code snippets", "using l code snippets", "using low code snippets", "using lbm code snippets", "using lc code slippers"
"rong tin java snippets" » "trong tin java snippets", "rong tinh java snippets", "dong tin java snippets", "rong trinh java snippets", "rong think java snippets", "rong tin va snippets", "rong tin java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using lc code snippets") or ("rong tin java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using lc code snippets") OR ("rong tin java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using lc code snippets ) or ( rong tin java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using lc code snippets") or ("rong tin java snippets"))) or ("locating bug code snippets"))*.