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