Perhaps you should try some spelling variations:
"dong cac trong slippers" » "dong cac truong slippers", "dong cay trong slippers", "dong tac trong slippers", "duong cac trong slippers", "dong bac trong slippers", "dung cac trong slippers", "dong cac trong slippery", "dong cac trong 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 cac trong 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 cac trong slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cac trong slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cac trong slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.