It is acceptable to pass objects with the right or both hands

It is rude and unclean to pass objects with the left hand

To show a vendor one is not interested in the merchendise they are selling, make a pushing motion with their arms and make no eye contact

Call a taxi by raising one arm

If close to a person, snap fingers to get their attention; if far away, make a "tsssss" sound.

Men and women should keep distance in public and act reserved around the oposite gender

Don't  keep eye contact with someone of higher status 

People of the same gender can hold hands in public as a sign of friendship

Couples only hold hands in urban areas, in rural areas it is considered impolite to show public signs of affection