Perhaps you should try some spelling variations:
"doc lieu data slippers" » "doc lieu dao slippers", "doc bieu dat slippers", "doc lieu da slippers", "duoc lieu data slippers", "doc hieu data slippers", "du lieu data slippers", "doc lieu data slippery", "doc lieu data 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: (((("doc lieu data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc lieu data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc lieu data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc lieu data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.