Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
dong phuong » duong phuong, dung phuong, dong huong
hieu quang » thieu quang, hieu quan, hieu qua
trinh toan » tinh toan, thanh toan, trinh han
hieu sang » chieu sang, hieu lang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
cua dong » chua dong, cua cong, cua dang
toan tap » toan ban

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 sang) or (hieu quang)) - hanh tang cua dong phuong trinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sang) OR (hieu quang)) - hanh tang cua dong phuong trinh toan tap.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sang) or (hieu quang)) - hanh tang cua dong phuong trinh toan tap*.