Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
manh trung » manh tung, thanh trung, manh hung
hieu lang » chieu sang, hieu quang, nhieu tang
tuan van » luan van, tran van, tan van
van cong » van dong, van phong, phan cong
cong san » cong tac
toan cao » toan ban
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: theo ((dieu hanh) or (hieu lang)) - manh trung tuan van cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (hieu lang)) - manh trung tuan van cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (hieu lang)) - manh trung tuan van cong san ((toan cao) or (toan tap))*.