Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
cong cuong » cong cong, cong luong, cong huong
cuong dang » cuong dung, cuong danh, cuong bang
dang quang » dung quang, nang quan, dang hung
trung hoc » trung quoc
quang cao » nang cao, quang nam
doc hieu » toc thieu, hoc thieu, hoc hien
trung ha » trung tam, trung cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu nganh - thanh ((trung ha) or (trung hoc)) cong cuong dang quang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - thanh ((trung ha) OR (trung hoc)) cong cuong dang quang cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - thanh ((trung ha) or (trung hoc)) cong cuong dang quang cao*.