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