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