Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung tin core snippets" » "dong tin core snippets", "luong tin core snippets", "dung tren core snippets", "dung tio2 core snippets", "dung tin co snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung tin core snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tin core snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tin core snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tin core snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.