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