Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van anh cat snippets" » "van anh code snippets", "van thanh cat snippets", "van minh cat snippets", "tuan anh cat snippets", "van hanh cat snippets", "van anh dat snippets", "van anh ca 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 anh cat 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 anh cat snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van anh cat snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van anh cat snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.