I can't orgasim by masturbation or by sexual intercourse.

the way i could ever orgasim is alone in the bath tub or a something that viberates and alot! Im not an expert but i have done this alot the next time you are alone or if you want your husband boyfriend whatever to join just go to the tub the the water just right and let the water run on your clit it may sound weird but more and more women are doing this or using viberators but for me water works just fine and another thing dont concentrate so much on havin one cuz that could stop you from having one as well just relax and let the water work

Female orgasm varies from person to person. Usually fingering the clitoris will arouse your sexual impulse. If indulge in sexual intercourse foreplay such as kissing and touching breast ans sucking the nipples for some times till it hardens will excite you. you must tell your partner to prolong the process.

You may ask your partner to do cunnilingus ( licking the Clitoris with tongue ) for a few minutes this way you will be aroused and ready for the actual Sex Act..
If you do fellatio (the stimulation of man's Penis using the tongue or lips) his Penis will become hardens. If at that time he insert the penis you my slowly feel orgasm till ejaculation.