Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao doanh o snippets" » "cho doanh o snippets", "cac doanh o snippets", "cao danh o snippets", "cao doanh co snippets", "cao doanh _ 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 doanh o 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 doanh o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao doanh o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao doanh o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.