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