Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do tren moi snippets" » "do tren mo snippets", "do trong moi snippets", "do thien moi snippets", "dong tren moi snippets", "duoc tren moi snippets", "do trung moi 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: (((("do tren 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: (((("do tren moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do tren moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do tren moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.