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