Merge pull request #148 from if045/SK-tech

Sk tech
Merged with develop and fixed bug
fix bug with search logic
bug fixing
fixing bug
fixing
seraching w/o spaces
Merge pull request #149 from if045/YM-tech

fix bug with search logic
Merge pull request #150 from if045/RS-tech

RS-tech
fixed data base
fixed backend classes
fixed frontend code