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