Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"viet da ca snippets" » "viet da code snippets", "viet dao ca snippets", "viet dat ca snippets", "viet ha ca snippets", "viet dan ca snippets", "viet da cau snippets", "viet da cua 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: (((("viet da ca snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet da ca snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( viet da ca snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet da ca snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.