Perhaps you should try some spelling variations:
"dung khang code snippets" » "dung thang code snippets", "quang khang code snippets", "dung nhan code snippets"
"dung vat code slippers" » "dung va code slippers", "dong vat code slippers", "dung dat code slippers", "dung rate code slippers", "dung vat co slippers", "dung vat de slippers"
"locating bug code snippets" » "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: (((("dung khang code snippets") or ("dung vat code slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung khang code snippets") OR ("dung vat code slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung khang code snippets ) or ( dung vat code slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung khang code snippets") or ("dung vat code slippers"))) or ("locating bug code snippets"))*.