Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet hai chu snippets" » "viet ha chu snippets", "viet han chu snippets", "viet lai chu snippets", "viet hai chau snippets", "viet hoi chu snippets", "viet hai chi 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: (((("viet hai chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet hai chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet hai chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet hai chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.