Perhaps you should try some spelling variations:
"nhan duoc trinh snippets" » "nhan doc trinh snippets", "nhan quoc thinh snippets", "nhan duoc tren snippets", "nhan cuoc trinh snippets", "nhan quoc trinh snippets", "phan duoc trinh snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"
"locating bug code snippets" » "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: (((("dung java java slippers") or ("nhan duoc trinh snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java slippers") OR ("nhan duoc trinh snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java slippers ) or ( nhan duoc trinh snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java slippers") or ("nhan duoc trinh snippets"))) or ("locating bug code snippets"))*.