Perhaps you should try some spelling variations:
"dong bac robot slippers" » "dong tao robot slippers", "dong a robot slippers", "dong tay robot slippers", "dong bang robot slippers", "dong luc robot slippers", "dong hoc robot slippers", "dong bac robot slippery", "dong bac robot 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 bac robot 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 bac robot slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong bac robot slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong bac robot slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.