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