Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
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 cong » dang cong, hang nong, bang cong
toc hieu » toc thieu, doc hieu, hoc thieu
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - hanh trung cua ((nhung cong) or (hang cong)) tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - hanh trung cua ((nhung cong) OR (hang cong)) tac toan tap.
• Adding a wildcard symbol may retrieve word variants: toc hieu lang - hanh trung cua ((nhung cong) or (hang cong)) tac toan tap*.