Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dong hoc de snippets" » "dong co de snippets", "dong luc de snippets", "dong hoc he snippets", "dong hoc te snippets", "dong hoc do snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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