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