Perhaps you should try some spelling variations:
"dung quang code snippets" » "dang quang code snippets", "luong quang code snippets", "dung luan code snippets", "dung quang de snippets", "dung quang code slippers"
"khoa can code snippets" » "khoa cam code snippets", "khoa cap code snippets", "khoi can code snippets", "khoa cfd code snippets", "khoa can 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: (((("khoa can code snippets") or ("dung quang code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa can code snippets") OR ("dung quang code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa can code snippets ) or ( dung quang code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa can code snippets") or ("dung quang code snippets"))) or ("locating bug code snippets"))*.