Perhaps you should try some spelling variations:
"dong chuan chon snippets" » "dong chan chon snippets", "dong thuan chon snippets", "dong chuyen chon snippets", "dong chan cho snippets", "dong chuan chat snippets", "dong chuan chau 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: (((("dong chuan chon snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong chuan chon snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong chuan chon snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong chuan chon snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.