Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet goc doi snippets" » "viet duc doi snippets", "viet o doi snippets", "viet co doi snippets", "viet hoc doi snippets", "viet goc do snippets", "viet cuoc doi 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 goc doi 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 goc doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet goc doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet goc doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.