Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu manh o2 snippets" » "chieu xanh o2 snippets", "hieu nganh o2 snippets", "dieu hanh o2 snippets", "hieu manh hon 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: (((("hieu manh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu manh o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu manh o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu manh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.