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