Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"sinh kiem a1 snippets" » "trinh kiem a1 snippets", "binh khiem a1 snippets", "sinh vien a1 snippets", "sinh kiem lam snippets", "sinh kiem sat snippets", "sinh kiem van 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: (((("sinh kiem a1 snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sinh kiem a1 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( sinh kiem a1 snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sinh kiem a1 snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.