Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van hanh cho snippets" » "van hanh code snippets", "van thanh cho snippets", "ban hanh cho snippets", "van anh cho snippets", "van danh cho snippets", "van han cho snippets", "van hang cho 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: (((("van hanh cho snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van hanh cho snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van hanh cho snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hanh cho snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.