Perhaps you should try some spelling variations:
"dung thanh code snippets" » "dong thanh code snippets", "dang thanh code snippets", "dung thang code snippets", "dung thanh cong snippets", "dung thanh de snippets", "dung thanh code slippers"
"hanh cad code snippets" » "hanh cac code snippets", "hanh cat code snippets", "hanh cap code snippets", "hanh cfd code snippets", "hanh cad model snippets", "hanh cad 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: (((("hanh cad code snippets") or ("dung thanh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh cad code snippets") OR ("dung thanh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh cad code snippets ) or ( dung thanh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh cad code snippets") or ("dung thanh code snippets"))) or ("locating bug code snippets"))*.