Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu huong o2 snippets" » "thu cong o2 snippets", "thu huong doi snippets", "thu huong uoc snippets", "thu huong 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: (((("thu huong 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: (((("thu huong o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu huong o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu huong o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.