Definition

1. Conjunction:
   • Therefore / Thus / So: Used to introduce a logical conclusion or result based on the information given in the previous clause or sentence. It connects a cause or reason to its effect or consequence.

Usage Examples

• Conjunction:
  • Trời mưa to. Vì vậy, chúng tôi ở nhà. (It rained heavily. Therefore, we stayed home.)
  • Cô ấy chăm chỉ và thông minh. Vì vậy, cô ấy đạt điểm cao. (She is hardworking and smart. Thus, she achieved high scores.)
  • Tôi không có tiền. Vì vậy, tôi không thể mua nó. (I have no money. So, I cannot buy it.)

Advanced Usage

• Used at the beginning of a sentence or clause, often following a period or semicolon from the preceding statement. It is a formal and common transitional word in both written and spoken Vietnamese.
• It can be used interchangeably with "do đó" or "cho nên" in many contexts, though "vì vậy" is slightly more formal.

Variants and Related Words

• Do đó (conj): Therefore, hence. A direct synonym.
  • Anh ấy bị ốm. Do đó, anh ấy nghỉ làm. (He is sick. Therefore, he is off work.)
• Cho nên (conj): So, therefore. Another common synonym.
  • Tôi yêu âm nhạc cho nên tôi học piano. (I love music so I learn piano.)
• Thế nên (conj): And so, that's why. A more colloquial variant.

Synonyms

• Therefore: For that reason.
• Thus: As a result or consequence.
• Consequently: As a result.
• Hence: From this reason.
• So: And for this reason (less formal).

Related Phrases

• Chính vì vậy: Precisely for that reason, that is exactly why. Adds emphasis.
  • Cô ấy là chuyên gia. Chính vì vậy, ý kiến của cô ấy rất quan trọng. (She is an expert. That is exactly why her opinion is very important.)