Perhaps you should try some spelling variations:
"dan khanh cay snippets" » "dang khanh cay snippets", "van khanh cay snippets", "dat khanh cay snippets", "dan nhanh cay snippets", "dan hanh cac snippets", "dan hanh cat 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: (((("dan khanh cay snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan khanh cay snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan khanh cay snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan khanh cay snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.