Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu cua hoc snippets" » "hieu qua hoc snippets", "dieu cua hoc snippets", "bieu cua hoc snippets", "hieu cua hoi snippets", "hieu cua thuoc snippets", "hieu cua nuoc 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: (((("hieu cua 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: (((("hieu cua hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu cua hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu cua hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.