Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"khi phan cac snippets" » "khi phan code snippets", "chi phan cac snippets", "khi nhan cac snippets", "phi phan cac snippets", "khi nhan cach snippets", "khi phan dau snippets", "khi phan lap 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: (((("khi phan 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: (((("khi phan cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( khi phan cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi phan cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.