Perhaps you should try some spelling variations:
"dung so robot snippets" » "dung cho robot snippets", "dung tao robot snippets", "dung voi robot snippets", "dung co robot snippets", "dung mo robot snippets", "dung so robot slippers"
"hang va java snippets" » "hang java java snippets", "hang va java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 so robot snippets") or ("hang va java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung so robot snippets") OR ("hang va java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung so robot snippets ) or ( hang va java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung so robot snippets") or ("hang va java snippets"))) or ("locating bug code snippets"))*.