Perhaps you should try some spelling variations:
"duong trung code snippets" » "duong truong code snippets", "dung trung code snippets", "duong trong code snippets", "duong trung co snippets", "duong trung code slippers"
"using a code snippets" » "using a 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 a code snippets") or ("duong trung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("duong trung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( duong trung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("duong trung code snippets"))) or ("locating bug code snippets"))*.