Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chau vu cao snippets" » "chau au cao snippets", "chau phu cao snippets", "chau van cao snippets", "chau cu cao snippets", "chau va cao 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: (((("chau vu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chau vu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chau vu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chau vu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.