Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
thong than » thong thanh, thong phan, thong nhan
hoc chieu » hoc thieu, ho chieu, hoc hien
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
than toan » thanh toan, than tuan, thuat toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - ((canh tranh) or (thanh trung)) ((cua thong) OR (cua khong)) thong than toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - ((canh tranh) OR (thanh trung)) ((cua thong) OR (cua khong)) thong than toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - ((canh tranh) or (thanh trung)) ((cua thong) OR (cua khong)) thong than toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - ((canh tranh) or (thanh trung)) ((cua thong) OR (cua khong)) thong than toan ban*.