Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong vang » cong lang, cong quang, cong ngang
doc hieu » toc thieu, hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
cua dong » chua dong, cua cong, cua dang
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: doc hieu manh - hanh tinh cua dong ((cong luong) or (cong vang)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh tinh cua dong ((cong luong) OR (cong vang)) phan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh tinh cua dong ((cong luong) or (cong vang)) phan cau*.