Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trung » thanh trung, hanh trang, manh trung
dong huong » dong thuong, dong duong, cong huong
trung cua » truong cua, trung tuan, trung cap
cua dong » chua dong, cua cong, cua dang
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu nganh) or (dieu hanh)) - hanh trung cua dong huong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (dieu hanh)) - hanh trung cua dong huong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (dieu hanh)) - hanh trung cua dong huong dan toan cao*.