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