Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan viec chi snippets" » "dan viec code snippets", "dan viet chi snippets", "dan vien chi snippets", "van viec chi snippets", "dan viec cho snippets", "dan viec cuoi snippets", "dan viec phai 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: (((("dan viec chi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan viec chi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dan viec chi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan viec chi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.