Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
nhung tuong » nhung huong, hung vuong, nhung cong
hieu quang » thieu quang, hieu quan, hieu qua
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
tung cua » trung cua, tuong cua, dung cua
san tay » ban tay, dan tay, han tay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu quang) or (chieu xanh)) - thanh tung cua ((nhung tuong) OR (nhung phuong)) thanh san tay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu quang) OR (chieu xanh)) - thanh tung cua ((nhung tuong) OR (nhung phuong)) thanh san tay.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu quang) or (chieu xanh)) - thanh tung cua ((nhung tuong) OR (nhung phuong)) thanh san tay".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu quang) or (chieu xanh)) - thanh tung cua ((nhung tuong) OR (nhung phuong)) thanh san tay*.