Perhaps you should try some spelling variations:
"ngu java java snippets" » "ngu va java snippets"
"han ung java slippers" » "han using java slippers", "han ung va slippers", "phan ung java slippers", "chan dung java slippers", "han tong java slippers", "han ung java slippery", "han ung 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: (((("ngu java java snippets") or ("han ung java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu java java snippets") OR ("han ung java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu java java snippets ) or ( han ung java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu java java snippets") or ("han ung java slippers"))) or ("locating bug code snippets"))*.