Perhaps you should try some spelling variations:
"thang nhoc o snippets" » "thang nho o snippets", "than hoc o snippets", "thanh hoc o snippets", "thang hoc o snippets", "thang nuoc o snippets"
"python using java snippets" » "python using data 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: (((("thang nhoc o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thang nhoc o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thang nhoc o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thang nhoc o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.