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