Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"lang van cong snippets" » "dang van cong snippets", "tang van cong snippets", "hoang van cong snippets", "lang van dong snippets", "lang van phong snippets", "lang phan 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: (((("lang van 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: (((("lang van cong snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lang van cong snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lang van cong snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.