Perhaps you should try some spelling variations:
"trong tran viet slippers" » "trong trang viet slippers", "trong tranh viet slippers", "trong tan viet slippers", "trong trien viet slippers", "trong gian viet slippers", "trong san viet slippers", "trong tran viet slippery", "trong tran viet grippers"
"dung java java snippets" » "dung va java snippets"
"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 ("trong tran viet slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trong tran viet slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trong tran viet slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trong tran viet slippers"))) or ("locating bug code snippets"))*.