Perhaps you should try some spelling variations:
"trinh phan co snippets" » "trinh han co snippets", "trinh quan co snippets", "thanh phan co snippets", "trinh phan bo snippets", "trinh phan cong snippets", "trinh phan cac snippets"
"dang java java snippets" » "dang 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: (((("dang java java snippets") or ("trinh phan co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang java java snippets") OR ("trinh phan co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang java java snippets ) or ( trinh phan co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") or ("trinh phan co snippets"))) or ("locating bug code snippets"))*.