Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong san so snippets" » "cong san so snippets", "dong bang so snippets", "dong von so snippets", "dong san co snippets", "dong dan so snippets", "dong san ho snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 san so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong san so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong san so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong san so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.