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