Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh phan » trinh han, trinh quan, thanh phan
hieu manh » chieu xanh, hieu nganh, dieu hanh
toc hieu » toc thieu, doc hieu, hoc thieu
phan ung » phan xuong, phan cong
ung cong » dung cong, luong cong, duong cong
dan tocn » dan toan, dang toan, dan hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu manh - hanh trinh phan ung cong ((dan tocn) or (dan toc)) bi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - hanh trinh phan ung cong ((dan tocn) OR (dan toc)) bi*.