Perhaps you should try some spelling variations:
"trinh ban sach snippets" » "trinh han sach snippets", "trinh van sach snippets", "trinh san sach snippets", "trinh ban sac snippets", "trinh ban mach snippets", "trinh ngan sach snippets", "trinh ban sach 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: (((("trinh ban sach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh ban sach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh ban sach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh ban sach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.