Perhaps you should try some spelling variations:
pham thuong » phan thuong, pham hong
thanh trung » thanh tung
thieu sang » thieu khang, thieu quang, hieu lang
chieu sang » chieu sach, chieu xanh, hieu lang
trung pham » trung phan, tung pham, trung phat
cong luan » cong tuan, dong luan, cong luong
tong luan » tang luan, dung luan, hang luan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) OR (chieu sang)) - thanh trung pham thuong ((cong luan) or (tong luan)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu sang)) - thanh trung pham thuong ((cong luan) OR (tong luan)) phan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (chieu sang)) - thanh trung pham thuong ((cong luan) or (tong luan)) phan lap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (chieu sang)) - thanh trung pham thuong ((cong luan) or (tong luan)) phan lap*.