Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van chung do snippets" » "van chuong do snippets", "van hung do snippets", "van phung do snippets", "van chung co snippets", "van chung o snippets", "van nhung don 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 chung do 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 chung do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van chung do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van chung do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.