Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri dan hoc snippets" » "tri van hoc snippets", "tri ban hoc snippets", "thi dan hoc snippets", "tri dan toc snippets", "tri dai 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: (((("tri dan 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: (((("tri dan hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri dan hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri dan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.