Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tho viet den snippets" » "thon viet den snippets", "thong viet den snippets", "hoc viet den snippets", "tho biet den snippets", "tho viet yen snippets", "tho viet dung 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: (((("tho viet den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tho viet den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tho viet den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tho viet den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.