Perhaps you should try some spelling variations:
thai viet » thi viet, tai viet, mai viet
viet tech » viet sach
cong luan » tong luan, cong tuan, dong luan
thuong ho » tuong ho, truong hoc, thuong chi
cong tan » cong tac, cong san, cong thanh
dan phan » doan phan, dan chan, van phan
ho dan » hoa dan, hoc dan, hoi dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thai viet tech - thanh ((cong luan) or (cong tan)) thuong ho dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thai viet tech - thanh ((cong luan) OR (cong tan)) thuong ho dan phan tu*.