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