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