Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong tu doan snippets" » "dong tu code snippets", "dong luc doan snippets", "thong tu doan snippets", "dong tai doan snippets", "dong du doan snippets", "dong tu dan snippets", "dong tap doan 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 tu doan 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 tu doan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong tu doan snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tu doan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.