Perhaps you should try some spelling variations:
"trac doi trinh slippers" » "trac doc trinh slippers", "trac doi tinh slippers", "trac dong trinh slippers", "trao doi trinh slippers", "truan doi trinh slippers", "thay doi trinh slippers", "trac doi trinh slippery", "trac doi trinh 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: (((("trac doi trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trac doi trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trac doi trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trac doi trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.