Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
hang nong » thang long, han tong
dang cong » dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan 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 lang - hanh trung cua ((nhung cong) or (((hang nong) or (dang cong)))) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh trung cua ((nhung cong) OR (((hang nong) OR (dang cong)))) dan than tap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh trung cua ((nhung cong) or (((hang nong) or (dang cong)))) dan than tap*.