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 khong, cua tong
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 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 thong than toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - ((canh tranh) or (thanh trung)) cua thong thong than toan ban*.