Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van gio hoc snippets" » "van giao hoc snippets", "van gioi hoc snippets", "van gia hoc snippets", "van gio hoac snippets", "van gio hon snippets", "van giup hoc 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 gio hoc 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 gio hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van gio hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van gio hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.