Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cua viet cau snippets" » "cua viet code snippets", "ca viet cau snippets", "hoa viet cau snippets", "cua dieu cau snippets", "cua viet chau snippets", "cua viet ca snippets", "cua viet chu 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: (((("cua viet cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cua viet cau snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cua viet cau snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua viet cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.