Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet van cau snippets" » "viet nam cau snippets", "viet anh cau snippets", "viet ha cau snippets", "viet van dau snippets", "viet van hau snippets", "viet 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: (((("viet 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: (((("viet van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.