Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc cong di snippets" » "hoc co di snippets", "cac cong di snippets", "hoc dung di snippets", "hoc cong li snippets", "hoc cong ti snippets", "hoc cong bi 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: (((("hoc cong di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc cong di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc cong di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc cong di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.