Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
vung nhanh » dung nhan
hieu lang » chieu sang, hieu quang, nhieu tang
cong vung » cong dung, cong hung, cong vang
nhanh cau » nhanh cay, thanh chau, nhanh ha
doi hieu » doi chieu, doc hieu, doi hien
trung ha » trung hoc, 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: doi hieu lang - thanh ((trung tam) or (trung ha)) nhung cong vung nhanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh ((trung tam) OR (trung ha)) nhung cong vung nhanh cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh ((trung tam) or (trung ha)) nhung cong vung nhanh cau*.