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