Perhaps you should try some spelling variations:
"dat xuan trinh slippers" » "dat qua trinh slippers", "dat xuan dinh slippers", "dat xuan kinh slippers", "dao xuan trinh slippers", "dat luan trinh slippers", "dac xuan trinh slippers", "dat xuan trinh slippery", "dat xuan 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: (((("dat xuan 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: (((("dat xuan trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat xuan trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat xuan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.