Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tinh cua snippets" » "van thinh cua snippets", "van minh cua snippets", "ban tinh cua snippets", "van trinh cua snippets", "van sinh cua snippets", "van tinh chat 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 tinh 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: (((("van tinh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tinh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tinh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.