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"
"quang cua code snippets" » "quan cua code snippets", "quang tuan code snippets", "quang huy code snippets", "quang cua cong snippets", "quang cua co snippets", "quang cfd code snippets", "quang cua 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 ("quang cua 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 ("quang cua code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh han code snippets ) or ( quang cua code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh han code snippets") or ("quang cua code snippets"))) or ("locating bug code snippets"))*.