Perhaps you should try some spelling variations:
"cong lang dat slippers" » "cong vang dat slippers", "cong luong dat slippers", "cong quang dat slippers", "cong lang dai slippers", "cong lang hat slippers", "cong mang dat slippers", "cong lang dat slippery", "cong lang dat 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: (((("cong lang 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 lang dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong lang dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong lang dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.