Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"voi quoc doi snippets" » "voi cuoc doi snippets", "vuon quoc doi snippets", "mai quoc doi snippets", "voi quoc hoi snippets", "voi luoc 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: (((("voi quoc 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: (((("voi quoc doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( voi quoc doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("voi quoc doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.