Perhaps you should try some spelling variations:
"do dan trinh slippers" » "do dan tinh slippers", "do van trinh slippers", "do hanh trinh slippers", "do danh trinh slippers", "dao dan trinh slippers", "do dang trinh slippers", "do dan trinh slippery", "do dan 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: (((("do dan 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: (((("do dan trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do dan trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do dan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.