Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"van lu code snippets" » "van bug code snippets", "van lbm code snippets", "van luc code snippets", "van du code snippets", "van le code snippets"

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 lu code snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using java snippets\") OR (\"van lu code snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( python using java snippets ) OR ( van lu code snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") OR ("van lu code snippets"))) OR ("locating bug core snippets"))*.