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