Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thong cong » trong cong, tong cong, thong thong
trung cap » truong cao
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 - thanh ((trung cap) or (trung tam)) thong cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - thanh ((trung cap) OR (trung tam)) thong cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - thanh ((trung cap) or (trung tam)) thong cong dan chan cau*.