Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"danh cot them slippers" » "danh co them slippers", "danh cho them slippers", "danh bat them slippers", "danh cot thep slippers", "danh cong them slippers", "danh cot them slippery", "danh cot them 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 ("danh cot them slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("danh cot them slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( danh cot them slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("danh cot them slippers"))) or ("locating bug code snippets"))*.