Perhaps you should try some spelling variations:
"trinh han code snippets" » "trinh quan code snippets", "trinh han che snippets", "trinh han cosh snippets", "trinh han code slippers"
"dan nam code snippets" » "dan nam co snippets", "dan lbm code snippets", "dan nam de snippets", "van nam code snippets", "dong nam code snippets", "dinh nam code snippets", "dan nam 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: (((("trinh han code snippets") or ("dan nam code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh han code snippets") OR ("dan nam code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh han code snippets ) or ( dan nam code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh han code snippets") or ("dan nam code snippets"))) or ("locating bug code snippets"))*.