Perhaps you should try some spelling variations:
"dong tran hung slippers" » "dong tranh hung slippers", "dang tran hung slippers", "dong tren hung slippers", "dong tran hong slippers", "dong tran quang slippers", "dong tran hoang slippers", "dong tran hung slippery", "dong tran hung 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 tran hung 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 tran hung slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tran hung slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tran hung slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.