Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong tin cac snippets" » "cong tin code snippets", "cong tinh cac snippets", "cong tan cac snippets", "dong tin cac snippets", "cong ton cac snippets", "cong tinh cach snippets", "cong trinh cac 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: (((("cong tin cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong tin cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong tin cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tin cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.