Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
doanh khanh » doanh thanh, doanh nhan, dinh khanh
phong cong » phong chong, thong cong, chong cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet anh - doanh doanh khanh phong cong tan phan tu~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - doanh doanh khanh phong cong tan phan tu*.