Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"theo cho hoc snippets" » "theo chu hoc snippets", "thep cho hoc snippets", "cheo co hoc snippets", "theo co hoc snippets", "theo 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: (((("theo cho 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: (((("theo cho hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( theo cho hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("theo cho hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.