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