Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet hai chi snippets" » "viet ha chi snippets", "viet han chi snippets", "viet lai chi snippets", "viet thai chi snippets", "viet tai chi snippets", "viet hai thi 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 chi 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 chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet hai chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet hai chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.