Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van voi con snippets" » "van loi con snippets", "van noi con snippets", "van von con snippets", "van voi cong snippets", "van voi chon snippets", "van voi can 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: (((("van voi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van voi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van voi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van voi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.