Perhaps you should try some spelling variations:
relational decision » rational decision, relations decision, operational decision
storage relational » storage operational, storage directional, large relational
data penting » data testing, data getting, data presenting
data openg » data open
data peng » data pet

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: information storage relational decision ((data openg) OR (((data peng) OR (data penting))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information storage relational decision ((data openg) or (((data peng) OR (data penting))))~".
• Adding a wildcard symbol may retrieve word variants: information storage relational decision ((data openg) or (((data peng) OR (data penting))))*.