Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
hieu lang » chieu sang, hieu quang, nhieu tang
cam nhung » cam hung, nam nhung, tham nhung
doi hieu » doi chieu, doc hieu, doi hien
ca nhung » cua nhung, va nhung, ca nung
cong dan » cong san, cong tan, huong dan
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 - tranh trong ((ca nhung) or (cam nhung)) cong dan ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - tranh trong ((ca nhung) OR (cam nhung)) cong dan ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - tranh trong ((ca nhung) or (cam nhung)) cong dan ((than cau) or (phan cau))*.