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