Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ha long snippets" » "van hai long snippets", "van ha dong snippets", "van hoa long snippets", "van chat long snippets", "van hanh long 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 ha long 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 ha long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ha long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ha long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.