Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho hoc ton snippets" » "co hoc ton snippets", "khoa hoc ton snippets", "cho hoc tong snippets", "cho hoc mon snippets", "cho hoc tan 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 hoc ton 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 hoc ton snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho hoc ton snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho hoc ton snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.