Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » hieu quang, nhieu tang, hieu van
trung tao » trung tam, trong tao, trung tai
van cong » van dong, van phong, phan cong
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
tao van » thao van, tao va, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chieu sang)) - thanh trung tao van cong thanh ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh trung tao van cong thanh ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sang)) - thanh trung tao van cong thanh ((toan cau) or (toan tap))*.