sed 's/ /\n/g' tags.txt | grep -P '\w+' | sort | split --lines=25 - tags2

cat tags2aa | sed ':a;N;$!ba;s/\n/+or+/g'

access
advanced
android-app
angular.js
app
application
as
aws-sdk
browse
calculation
calculations
camel
career-development
child
code-dump
columns
compass
computer
conversion
convert
cosmetic
create
custom
developer
development
display
dropdown
es5
es6
example
extension
false
feature-request
first
float
game
game-development
games
gap
gcl
gef
google-gson
horizontal
htm
hw-assignment
id
indirect
information
interview-questions
large
largest
length
lib
library
machine
manage
multiple
mvc-4
ndb
net
new
node
oauth2
program
programmatic
python3
python-3x
quartz
quartz
quiz
rails4
read
reader
regular
related
release-candidate
remote
remote
remove
responsive
rest-api
scanner
script
select2
server
sonata
spa
standalone
start
studio
tableless
teaching
threejs
true
understanding
unknown
value
values
visual
vs2013
webapi
web.api
win8
windowsforms
write
zf2