Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duc dung chi snippets" » "duc dung code snippets", "duc hung chi snippets", "duc cuong chi snippets", "duc phung chi snippets", "duc dung cho snippets", "duc dung thi snippets", "duc dung chien 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: (((("duc dung 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: (((("duc dung chi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( duc dung chi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc dung chi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.