Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"long mon hoc snippets" » "dong mon hoc snippets", "long muong hoc snippets", "mong muon hoc snippets", "long toan hoc snippets", "long dong 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: (((("long mon 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: (((("long mon hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( long mon hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("long mon hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.