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