Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao cuu hoc snippets" » "dao huu hoc snippets", "dao cau hoc snippets", "dao chu hoc snippets", "dao cua hoc snippets", "dao cuu thuoc snippets", "dao cuu khoa 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 cuu 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 cuu hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao cuu hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao cuu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.