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