Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"danh ca robot slippers" » "danh a robot slippers", "danh cho robot slippers", "danh tao robot slippers", "dan ca robot slippers", "doanh cua robot slippers", "danh ca robot slippery", "danh ca robot 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: (((("danh ca 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: (((("danh ca robot slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh ca robot slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh ca robot slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.