Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao lieu co snippets" » "cao hieu co snippets", "cao dieu co snippets", "co lieu co snippets", "cao lieu so snippets", "cao lieu cong snippets", "cao lieu hoc 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 lieu co 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 lieu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao lieu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao lieu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.