Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"da dieu hoc snippets" » "da lieu hoc snippets", "da dien hoc snippets", "da dieu hoa snippets", "va dieu hoc snippets", "dang dieu hoc snippets", "doan dieu 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: (((("da dieu 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: (((("da dieu hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( da dieu hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("da dieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.