Perhaps you should try some spelling variations:
"khan chap dat snippets" » "khan cap dat snippets", "khang chan dat snippets", "khau nhap dat snippets", "khan phap day snippets", "khan cai dat snippets", "khan lap dat snippets", "khan chap dat slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("khan chap dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khan chap dat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khan chap dat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khan chap dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.