Perhaps you should try some spelling variations:
duong manh » duong van
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
tinh cua » trinh cua, sinh cua, tinh chat
toan tap » toan ban
ho hieu » ho chieu, hoi hieu, nho hieu

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 - hanh tinh cua nhung ((duong sach) or (duong manh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tinh cua nhung ((duong sach) OR (duong manh)) toan tap.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tinh cua nhung ((duong sach) or (duong manh)) toan tap*.