Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"than van cau snippets" » "thanh van cau snippets", "tran van cau snippets", "phan van cau snippets", "than van dau snippets", "than van hau snippets", "than van chat 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: (((("than van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("than van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( than van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("than van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.