Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc thieu de snippets" » "toc thieu de snippets", "hoc hien de snippets", "hoc thiet de snippets", "hoc thieu ve snippets", "hoc thiet ke 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: (((("hoc thieu de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc thieu de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc thieu de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc thieu de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.