Perhaps you should try some spelling variations:
tuong thanh » truong thanh, muong thanh, luong thanh
nhung tuong » nhung huong, nhung phuong, hung vuong
hieu quang » thieu quang, hieu quan, hieu qua
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
cua nhung » va nhung
tung cua » trung cua, tuong cua, dung cua
san tap » han tap, man tap, san 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 sang)) - thanh tung cua nhung tuong thanh san tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu quang) OR (chieu sang)) - thanh tung cua nhung tuong thanh san tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu quang) or (chieu sang)) - thanh tung cua nhung tuong thanh san tap*.