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