Article in English: This may occur when you start talking to him about an uncomfortable topic. If you are talking to your spouse about something he is lying about, he may start to panic. Occasionally the lying spouse may actually slow down his blink rate going into the lie and speed it up afterwards.  Blinking frequently can be a reflex in this case. For example, you might ask your spouse, “Did you send the plane ticket to my mother for the holidays?” Perhaps he is lying about having a good relationship with your mother and didn’t send the ticket. So an increase in blinking during the conversation may occur. If your spouse avoids or overly tries to make eye contact then she may be lying about your current topic of discussion. A liar may avoid eye contact, but she may also try to overcompensate for lying by establishing eye contact for too long. Use the eye contact behavior as a gauge in conjunction with the other behaviors. You may ask your spouse, “Did you lose my high school trophy?” She could lie and say no while avoiding your gaze, but also stare you down while denying it. A sudden increase in scratching by your spouse during a conversation can indicate lying. This is sometimes an indication of heightened nervousness. The scratching may occur anywhere on the body. For example, you may ask your spouse “Are you going out drinking again?” He may scratch his head and deny this. This is a common indicator of lying. Your spouse may fidget in place, shift her feet, touch her face, or rub objects around her. She may also become suddenly very still.  For example you may ask her, “Did you go to the casino with your paycheck again?” And she may shift in their seat while denying it. Another example may be you asking your spouse, “Do you want to meet me for dinner tonight?” And she agrees, but doesn't mean it—meanwhile she is fondling some jewelry on her person while answering you. If your spouse is concentrating on her lie, this takes more energy and focus than telling the truth, which may cause movement to cease or be suppressed. If...

Summary in Vietnamese:
Quan sát sự chớp mắt quá mức. Nhìn vào mắt. Quan sát xem liệu vợ/chồng bạn có thực hiện hành động gãi quá mức. Quan sát sự bồn chồn của vợ/chồng bạn. Thoáng nhìn hành vi nuốt nước bọt của vợ/chồng bạn. Quan sát sự kết hợp của mọi dấu hiệu.