Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chap nhat le snippets" » "cap nhat le snippets", "phap phat le snippets", "phap nham le snippets", "chap nhat ve 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: (((("chap nhat le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chap nhat le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chap nhat le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chap nhat le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.