Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong thi hoa snippets" » "dong thi code snippets", "duong thi hoa snippets", "dang thi hoa snippets", "dong tai hoa snippets", "dong thi hoan snippets", "dong thi ha snippets", "dong thi hong 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: (((("dong thi hoa snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong thi hoa snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong thi hoa snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong thi hoa snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.