Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"van ngoc java snippets" » "van ngu java snippets", "tran ngoc java snippets", "van hoc java snippets", "van nghe java snippets"
"dung cac cong snippets" » "luong cac cong snippets", "dung cho cong snippets", "dung tai cong snippets", "dung cua cong 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: (((("van ngoc java snippets") or ("dung cac cong snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van ngoc java snippets") OR ("dung cac cong snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( van ngoc java snippets ) or ( dung cac cong snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ngoc java snippets") or ("dung cac cong snippets"))) or ("locating bugs code snippets"))*.