Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cong vang » cong lang, cong quang, cong ngang
vang phan » van phan, nang phan, quang phan
tang cua » mang cua, hang cua, tang luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - hanh ((tang cua) or (trung cua)) nhung cong vang phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh ((tang cua) OR (trung cua)) nhung cong vang phan tu*.