Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van cao oc snippets" » "van cao code snippets", "van dao oc snippets", "van bao oc snippets", "van cau oc snippets", "van cao hoc snippets", "van cao toc snippets", "van cao ngoc 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 cao oc 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 cao oc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van cao oc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van cao oc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.