Perhaps you should try some spelling variations:
chap thuong » chan thuong, phan thuong, pham thuong
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cong luan » cong tuan, dong luan, cong luong
tong luan » tang luan, dung luan, hang luan
phan cac » nhan cach, phan dau, phan lap

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