Perhaps you should try some spelling variations:
"sinh viet trinh slippers" » "sinh viet trung slippers", "sinh viet thanh slippers", "sinh viet trong slippers", "sinh vien trinh slippers", "ninh viet trinh slippers", "dinh viet trinh slippers", "sinh viet trinh slippery", "sinh viet 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: (((("sinh viet 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: (((("sinh viet trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sinh viet trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sinh viet trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.