Web of Science

(#5) TS =" Electronic textiles": 1,521
(#6) TS =" Smart textiles ": 1,803  
(#7) (TS=" Electronic textiles ") AND (TS =" Smart textiles "): 718  
 (#8) (TS=" Electronic textiles ") OR (TS =" Smart textiles "): 2,334
As their intersection eliminates some results, we decide to use their union.
We try to use some other keywords:
(#9) TS =" Smart fabrics  ": 1,249 
(#10) TS =" Smart clothing ": 818      
(#11) TS =" Interactive textiles ": 307    
(#12) TS =" Smart garments ": 341    
(#13) (TS=" Electronic textiles ") AND (TS =" Smart textiles ") AND ("Smart fabrics"): 150
 (#14) (TS=" Electronic textiles ") AND (TS =" Smart textiles ") OR ("Smart fabrics") : 1,386
(#15) (TS=" Electronic textiles ") OR (TS =" Smart textiles ") OR ("Smart fabrics")  : 3,516
(#16) (TS=" Electronic textiles ") OR (TS =" Smart textiles ") OR ("Smart fabrics") OR (TS =" Interactive textiles ") OR (" Smart garments ")   : 4,137
It has been decided to use the union of all the 5 keywords. Now we try to remove the ones related to "MATERIALS SCIENCE MULTIDISCIPLINARY" AND "MATERIALS SCIENCE TEXTILES" AND "CHEMISTRY PHYSICAL" which are not our point of interest. 
 (#17) (TS=" Electronic textiles ") OR (TS =" Smart textiles ") OR ("Smart fabrics") OR (TS =" Interactive textiles ") OR (" Smart garments ")   [excluding]  WEB OF SCIENCE CATEGORIES: ( "MATERIALS SCIENCE MULTIDISCIPLINARY" OR "MATERIALS SCIENCE TEXTILES" OR "CHEMISTRY PHYSICAL" ) :813
Which is significantly a good number to be looked at.