Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
doi hieu » doi chieu, doc hieu, doi hien
manh cua » doanh cua, ban cua
than cau » toan cau, than cap, thanh chau
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: doi hieu lang - lanh manh cua nhung ((cong ty) or (cong tac)) ((than cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - lanh manh cua nhung ((cong ty) OR (cong tac)) ((than cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - lanh manh cua nhung ((cong ty) or (cong tac)) ((than cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - lanh manh cua nhung ((cong ty) or (cong tac)) ((than cau) OR (phan cau))*.