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