Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van khoi cac snippets" » "van khoa cac snippets", "van khi cac snippets", "van choi cac snippets", "van hoi cac snippets", "van khai cac snippets", "van khoi can 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: (((("python using java snippets") or ("van khoi cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("van khoi cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van khoi cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van khoi cac snippets"))) or ("locating bug code snippets"))*.