Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet cuu hoi snippets" » "viet suu hoi snippets", "viet cau hoi snippets", "viet chu hoi snippets", "viet cua hoi snippets", "viet cuu hoc 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 cuu hoi 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 cuu hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet cuu hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet cuu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.