Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ham cho hoc snippets" » "han cho hoc snippets", "lam cho hoc snippets", "nam cho hoc snippets", "ham co hoc snippets", "ham khoa 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: (((("ham cho 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: (((("ham cho hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ham cho hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ham cho hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.