Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
chieu sang » chieu sach, chieu xanh, hieu lang
hang cong » dang cong, hang nong, bang cong
cong tac » cong ty
tac chan » tac chuan, tac can, tac chon
chan cau » phan cau, can cau, chinh cau
va tinh » may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (va tinh)) - hanh ((dung cho) or (trung tuan)) hang cong tac chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (va tinh)) - hanh ((dung cho) OR (trung tuan)) hang cong tac chan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (va tinh)) - hanh ((dung cho) or (trung tuan)) hang cong tac chan cau*.