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