Perhaps you should try some spelling variations:
"central tax research project ii." » "central a research project ii.", "central bank research project ii.", "central _ research project ii.", "central taxes research project ii.", "central tax research project epi.", "central tax research project hci.", "central tax research project ifd."
"central de research project aid." » "central does research project aid.", "central key research project aid.", "central led research project aid.", "central de research project based.", "central de research project risk.", "central de research project case.", "centrale des research project aid.", "central _ research project aid.", "centro de research project aid."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("central de research project aid.") or ("central tax research project ii."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("central de research project aid.") OR ("central tax research project ii."))*.
• Removing quotes may allow a broader search: (( central de research project aid. ) or ( central tax research project ii. ))*.