Perhaps you should try some spelling variations:
theo bien » thieu bien, theo tieu, che bien
bien tinh » bi tinh, yen tinh, diep tinh
bang luan » hang luan, dung luan, tong luan
tang luan » dung luan
dang cong » dung cong
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo bien tinh - hanh ((bang luan) or (tang luan)) dang cong ((dan than) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo bien tinh - hanh ((bang luan) OR (tang luan)) dang cong ((dan than) OR (dan chan)) cao.
• Adding a wildcard symbol may retrieve word variants: theo bien tinh - hanh ((bang luan) or (tang luan)) dang cong ((dan than) or (dan chan)) cao*.