Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trinh cua he snippets" » "trinh cua code snippets", "tinh cua he snippets", "trinh luat he snippets", "trinh quan he snippets", "trinh cua che snippets", "trinh cua te snippets", "trinh cua le 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 cua he 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 cua he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trinh cua he snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cua he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.