Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van kho ca snippets" » "van khoa ca snippets", "van khao ca snippets", "van khoi ca snippets", "van kho cua snippets", "van kho cam snippets", "van tho ca 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: (((("van kho ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van kho ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van kho ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van kho ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.