Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mem hoc cong snippets" » "mem hoc co snippets", "mem cac cong snippets", "mem hoc dung snippets", "mem chon cong 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: (((("mem hoc cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mem hoc cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mem hoc cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mem hoc cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.