Perhaps you should try some spelling variations:
"dong tham nhap snippets" » "dong tam nhap snippets", "hong tham nhap snippets", "dong thap nhap snippets", "dong tham khao snippets", "dong thu nhap snippets", "dong pham nhat snippets", "dong tham nhap 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 ("dong tham nhap snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using c code snippets") OR ("dong tham nhap snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using c code snippets ) or ( dong tham nhap snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using c code snippets") or ("dong tham nhap snippets"))) or ("locating bug code snippets"))*.