Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
hieu nganh » vien nganh, hiem ngan, nghiep nganh
trong dong » trong cong, trong nong, trong dang
hieu manh » chieu xanh, dieu hanh, hien hanh
dong toan » dung toan, bong toan, cong toan
trung su » trung vu, trong su, trung du
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 manh) or (hieu nganh))) or (thien thanh)) - thanh trung su dung trong dong toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (hieu nganh))) OR (thien thanh)) - thanh trung su dung trong dong toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) or (hieu nganh))) or (thien thanh)) - thanh trung su dung trong dong toan cao*.