Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc anh ve snippets" » "hoc nganh ve snippets", "hoc nhanh ve snippets", "hoc sinh ve snippets", "hoc hanh ve snippets", "hoc anh va snippets", "hoc anh viet 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 anh ve 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 anh ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc anh ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc anh ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.