Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu dong hoc snippets" » "thuy dong hoc snippets", "tu dong hoc snippets", "thu cong hoc snippets", "thu dong co snippets", "thu dong luc 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: (((("thu dong 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: (((("thu dong hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu dong hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu dong hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.