Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong van cuc snippets" » "cong vang cuc snippets", "cong san cuc snippets", "song van cuc snippets", "cong van duc snippets", "cong van luc snippets", "cong van cu 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 van cuc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong van cuc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong van cuc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong van cuc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.