Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van thi tre snippets" » "van thi code snippets", "van tai tre snippets", "dan thi tre snippets", "van thu tre snippets", "van thi tren snippets", "van thi tra snippets", "van thi tran snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("van thi tre snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("van thi tre snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van thi tre snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van thi tre snippets"))) or ("locating bug core snippets"))*.