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