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