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