Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat ki hoc snippets" » "nhat ky hoc snippets", "nhat moi hoc snippets", "nhat khi hoc snippets", "nhat li hoc snippets", "nhat vi 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: (((("nhat ki 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: (((("nhat ki hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat ki hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat ki hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.