Perhaps you should try some spelling variations:
thanh trung » thanh tung
thuong manh » thuong mach, thuong nganh, duong manh
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
tuan thong » toan thong, tran thong, tuan phong
hien sang » hien trang, khien bang, thien bang
toan cau » toan cao, toan ban, toan tap

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

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