Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho minh son snippets" » "chi minh son snippets", "cho sinh son snippets", "cao minh son snippets", "cho tinh son snippets", "cho minh toan snippets", "cho dinh 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: (((("cho minh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho minh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho minh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho minh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.