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