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