Perhaps you should try some spelling variations:
"dong luan dat slippers" » "dung luan dat slippers", "tong luan dat slippers", "dong xuan dat slippers", "dong luat dat slippers", "dong luan dac slippers", "dong luan day slippers", "dong luan dat slippery", "dong luan 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: (((("dong luan 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: (((("dong luan dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong luan dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong luan dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.