Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao xuan con snippets" » "do xuan con snippets", "ngo xuan con snippets", "dao van con snippets", "dao xuan can snippets", "dao xuan co snippets", "dao xuan son 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: (((("dao xuan con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao xuan con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao xuan con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao xuan con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.