Perhaps you should try some spelling variations:
"cao duc toan snippets" » "cao duc code snippets", "cao duc tan snippets", "cao duc ton snippets", "cao duc hoan snippets", "dao duc toan snippets", "cao suc toan snippets", "giao duc toan snippets"
"locating bug core snippets" » "locating bug code 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: (((("python using java snippets") or ("cao duc toan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("cao duc toan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( cao duc toan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("cao duc toan snippets"))) or ("locating bug core snippets"))*.