Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ten hieu moi snippets" » "tin hieu moi snippets", "den hieu moi snippets", "thien hieu moi snippets", "ten nhiem moi snippets", "ten hieu so snippets", "ten hieu bo 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: (((("ten hieu moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ten hieu moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ten hieu moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ten hieu moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.