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