Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hien hanh o2 snippets" » "dieu hanh o2 snippets", "hien hang o2 snippets", "hien hanh noi snippets", "hien hanh hoa 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: (((("hien hanh 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: (((("hien hanh o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hien hanh o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hien hanh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.