Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet de cua snippets" » "biet de cua snippets", "viet da cua snippets", "viet du cua snippets", "viet le cua snippets", "viet te cua snippets", "viet dieu cua 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 de cua 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 de cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet de cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet de cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.