Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong van dat slippers" » "cong vang dat slippers", "cong san dat slippers", "song van dat slippers", "cong van dao slippers", "cong van dau slippers", "cong dan dat slippers", "cong van dat slippery", "cong van dat 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: (((("cong van dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong van dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong van dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong van dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.