Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi khi hoc snippets" » "chi phi hoc snippets", "chi thi hoc snippets", "chi khoa hoc snippets", "chi khi hoi snippets", "chi khien 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: (((("chi khi 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: (((("chi khi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi khi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi khi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.