Perhaps you should try some spelling variations:
"tong cuc long snippets" » "tong cuc code snippets", "trong cuoc long snippets", "thong cua long snippets", "cong chuc long snippets", "tong cuu long snippets", "tong duc long snippets", "tong cuc lon snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("tong cuc long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong cuc long snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tong cuc long snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong cuc long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.