Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong tin don snippets" » "cong tin code snippets", "cong tinh don snippets", "cong tan don snippets", "dong tin don snippets", "cong tien dong snippets", "cong tin dung snippets", "cong tinh doi 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 don 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 don snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong tin don snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tin don snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.