Perhaps you should try some spelling variations:
"dang tinh cho snippets" » "dang dinh cho snippets", "dang sinh cho snippets", "dang vinh cho snippets", "dang trinh cho snippets", "dang tinh cao snippets", "dang tinh co snippets"
"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: (((("dang tinh cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang tinh cho snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang tinh cho snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang tinh cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.