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