Perhaps you should try some spelling variations:
"cuon danh toc snippets" » "cuong danh toc snippets", "cuoi dan toc snippets", "cuon sach toc snippets", "cuon dan toc snippets", "cuon danh hoc snippets", "cuon danh thuc snippets"
"using a code snippets" » "using a core snippets"
"locating bug code snippets" » "locating bug core snippets", "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 a code snippets") or ("cuon danh toc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("cuon danh toc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( cuon danh toc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("cuon danh toc snippets"))) or ("locating bug code snippets"))*.