Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao do cong snippets" » "dao doi cong snippets", "dao do hong snippets", "dao bo cong snippets", "dao o cong snippets", "dao ho cong snippets", "dao dong cong 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 do cong 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 do cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao do cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao do cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.