Perhaps you should try some spelling variations:
"dung tin danh snippets" » "dong tin danh snippets", "luong tin danh snippets", "dung tren danh snippets", "dung thien danh snippets", "dung trinh danh snippets", "dung minh danh snippets", "dung tin danh slippers"
"using c code snippets" » "using lc code snippets", "using a code snippets", "using _ code snippets", "using cfd code snippets", "using c code 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 c code snippets") or ("dung tin danh snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using c code snippets") OR ("dung tin danh snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using c code snippets ) or ( dung tin danh snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using c code snippets") or ("dung tin danh snippets"))) or ("locating bug code snippets"))*.