Perhaps you should try some spelling variations:
cong trong » cong thuong, duong trong, cong trinh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
manh hung » anh huong
trong dan » trong dang, trong san, trong tan
hung cua » huong cua, chung cua, khung cua
toan cau » toan cao, toan ban, toan tap
phan cau » phan dau, phan cac, phan tu

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 - manh hung cua cong trong dan ((toan cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - manh hung cua cong trong dan ((toan cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - manh hung cua cong trong dan ((toan cau) or (phan cau))*.