Perhaps you should try some spelling variations:
hien nganh » vien nganh, hien nhanh, hieu nganh
hanh trung » thanh trung, hanh trang, manh trung
dong thanh » truong thanh
trung cap » truong cao, trung tam
dang dong » dang cong, dung dong, dan dong
cap dang » cao dang, cac dang, cap bang
tuan cau » toan cau, quan cau, tuan cu
toan tu » toan du, tran tu, doan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien nganh - hanh trung cap dang dong thanh ((tuan cau) or (toan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nganh - hanh trung cap dang dong thanh ((tuan cau) OR (toan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nganh - hanh trung cap dang dong thanh ((tuan cau) or (toan tu))*.