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