help in performance

hi

i need some help in performence because this select is running time is to much:

Thanks

SELECT    vbrk~vbeln vbrk~vbtyp vbrk~fkdat vbrk~netwr vbrk~waerk vbrp~kvgr3 tvv3t~bezei dd07v~ddtext
      FROM ( ( ( vbrk
      INNER JOIN vbrp ON vbrp~vbeln EQ vbrk~vbeln
          AND vbrp~posnr EQ '00010'
          AND vbrp~ps_psp_pnr EQ l_project )
    LEFT OUTER JOIN

        tvv3t ON tvv3t~kvgr3 EQ vbrp~kvgr3
        AND tvv3t~spras EQ sy-langu )

    LEFT OUTER JOIN
        dd07v ON dd07v~domname EQ 'VBTYP'
        AND dd07v~ddlanguage EQ sy-langu
        AND dd07v~domvalue_l EQ vbrk~vbtyp )

    INTO TABLE sdtab

    WHERE vbrk~rfbsk EQ 'C'
          AND vbrk~fksto EQ ''
          AND vbrk~sfakn EQ ''.