Perhaps you should try some spelling variations:
"dang hanh trac slippers" » "dang thanh trac slippers", "ban hanh trac slippers", "dang van trac slippers", "dang anh trac slippers", "dang hanh tram slippers", "dang khanh trach slippers", "dang hanh trac slippery", "dang hanh trac 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: (((("dang hanh trac slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang hanh trac slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang hanh trac slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang hanh trac slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.