Perhaps you should try some spelling variations:
"dong can khach slippers" » "dong van khanh slippers", "dong vay khach slippers", "dong cua khach slippers", "dong chan khach slippers", "dong san khach slippers", "dong ban khach slippers", "dong can khach slippery", "dong can khach 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 can khach 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 can khach slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong can khach slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong can khach slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.