Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tho viet chu snippets" » "thon viet chu snippets", "thong viet chu snippets", "hoc viet chu snippets", "tho viet chau snippets", "tho viet cho snippets", "tho viet cau 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 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: (((("tho viet chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tho viet chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tho viet chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.