Perhaps you should try some spelling variations:
manh truong » manh trung, manh tuong, anh truong
hieu quang » thieu quang, hieu quan, hieu qua
chieu sach » chinh sach, chiet tach, chieu sang
truong cua » truong ca, truong quan, truong cao
ban cong » bang cong, van cong, phan cong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran tap » toan tap, tran tan, tran tuan

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 quang) or (chieu sach)) - manh truong cua ban cong tac tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu quang) OR (chieu sach)) - manh truong cua ban cong tac tran tap*.