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