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