Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van tan hoa snippets" » "van tan code snippets", "van tuan hoa snippets", "van ban hoa snippets", "van tai hoa snippets", "van van hoa snippets", "van tap hoa snippets", "van tan ha snippets"
"python using java snippets" » "python using data 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 tan hoa snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van tan hoa snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van tan hoa snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tan hoa snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.