Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van khoi cau snippets" » "van khoa cau snippets", "van khi cau snippets", "van choi cau snippets", "van hoi cau snippets", "van khoi can snippets", "van khoi dau 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 cau 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 cau snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van khoi cau snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van khoi cau snippets"))) or ("locating bug code snippets"))*.