Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao khai so snippets" » "cao chat so snippets", "co khi so snippets", "cao tai so snippets", "cao hai so snippets", "cao khai mo snippets", "cao khi so 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 khai 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: (((("cao khai so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao khai so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao khai so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.