Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cau voi hoc snippets" » "cau hoi hoc snippets", "cau doi hoc snippets", "cau noi hoc snippets", "cau vi hoc snippets", "cau voi ho 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: (((("cau voi 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: (((("cau voi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cau voi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cau voi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.