Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao voi cong snippets" » "cao noi cong snippets", "cao moi cong snippets", "cao tai cong snippets", "cap voi cong snippets", "dao voi cong snippets", "tao voi 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: (((("cao voi 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: (((("cao voi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao voi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao voi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.