Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van luat de snippets" » "va luat de snippets", "van xuat de snippets", "dan luat de snippets", "van luat ve snippets", "van luat ke snippets", "van luat du 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: (((("van luat de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van luat de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van luat de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van luat de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.